feat: Phase 3 VS-08 Risk Dashboard — GOV+DATA+DOMAIN+BE+FE (5/7)
- VS-08_DASHBOARD_SLICE_SPEC.md: Comprehensive dashboard specification - VS-08_DATA_CONTRACT.md: PIT aggregation schema + caching strategy - VS08_DashboardPolicy.cs: Aggregation logic (health score, insights, validation) - VS08_DashboardEndpoint.cs: GET /api/dashboard/risk + cache layer - RiskDashboard.vue: Unified portfolio view with real-time metrics - VS08_DashboardIntegrationTests.cs: 5 core policy tests Status: GOV+DATA+DOMAIN+BE+ASYNC+FE complete (5/7 vertical slices) TESTOPS: In progress (test suite has minor compatibility issues with VS-04/07) Cumulative: Phase 2 Batch 3 + Phase 3 = 27/36 components (75% COMPLETE) Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
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# VS-08: Risk Dashboard — Data Contract
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**Domain:** Comprehensive Risk Monitoring
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**Pattern:** Point-in-Time (PIT) Read Model + Event Stream
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---
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## Schema Overview
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| Table | Purpose | Ownership | TTL |
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|-------|---------|-----------|-----|
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| `risk_management.dashboard_snapshots` | Cached aggregations (portfolio + risk + stress + alerts) | VS-08 | <1hr |
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| `risk_management.vw_dashboard_data` | JOIN view (portfolio_positions + risk_metrics + stress + alerts) | Read-only | — |
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### dashboard_snapshots (PIT Write Model)
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Cached snapshot of portfolio risk profile, refreshed on-demand or event-triggered.
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```sql
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CREATE TABLE IF NOT EXISTS risk_management.dashboard_snapshots (
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id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
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portfolio_id UUID NOT NULL,
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snapshot_date DATE NOT NULL,
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-- Portfolio aggregates
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total_portfolio_value DECIMAL(18, 2) NOT NULL,
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position_count INT NOT NULL,
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-- Risk metrics (VS-05)
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var95 DECIMAL(18, 2),
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sharpe_ratio NUMERIC(5, 2),
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sortino_ratio NUMERIC(5, 2),
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volatility_percent NUMERIC(5, 2),
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concentration_top_five_percent NUMERIC(5, 2),
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max_position_percent NUMERIC(5, 2),
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-- Stress scenario flags (VS-06)
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bull_scenario_loss_percent NUMERIC(6, 2),
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bear_scenario_loss_percent NUMERIC(6, 2),
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rate_shock_loss_percent NUMERIC(6, 2),
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vol_spike_loss_percent NUMERIC(6, 2),
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-- Alert count (VS-07)
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alert_initial_count INT DEFAULT 0,
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alert_warning_count INT DEFAULT 0,
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alert_critical_count INT DEFAULT 0,
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-- Audit
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published_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
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revision INT DEFAULT 1,
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source_component VARCHAR(50) NOT NULL, -- 'api' or 'event'
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CONSTRAINT fk_portfolio FOREIGN KEY (portfolio_id)
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REFERENCES risk_management.portfolios(id),
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CONSTRAINT unique_snapshot_per_portfolio_per_date
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UNIQUE(portfolio_id, snapshot_date, published_at DESC)
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);
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CREATE INDEX idx_dashboard_portfolio_date
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ON risk_management.dashboard_snapshots(portfolio_id, snapshot_date DESC);
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```
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### vw_dashboard_data (Read-Only JOIN View)
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Real-time aggregation view joining VS-04~07 source tables. Used by API endpoint for <500ms latency.
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```sql
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CREATE OR REPLACE VIEW risk_management.vw_dashboard_data AS
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SELECT
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p.portfolio_id,
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p.snapshot_date,
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-- Portfolio (VS-04)
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COUNT(DISTINCT pp.symbol) as position_count,
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SUM(pp.market_value) as total_portfolio_value,
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-- Risk Metrics (VS-05)
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(SELECT var95 FROM risk_management.risk_metrics
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WHERE portfolio_id = p.portfolio_id
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AND published_at <= CURRENT_TIMESTAMP
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AND removed_at IS NULL
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ORDER BY published_at DESC LIMIT 1) as var95,
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(SELECT sharpe_ratio FROM risk_management.risk_metrics
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WHERE portfolio_id = p.portfolio_id
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AND published_at <= CURRENT_TIMESTAMP
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AND removed_at IS NULL
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ORDER BY published_at DESC LIMIT 1) as sharpe_ratio,
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-- Stress (VS-06)
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(SELECT portfolio_loss_percent FROM risk_management.stress_test_results
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WHERE portfolio_id = p.portfolio_id
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AND scenario_name = 'bear'
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AND published_at <= CURRENT_TIMESTAMP
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ORDER BY published_at DESC LIMIT 1) as bear_loss_percent,
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-- Alerts (VS-07)
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COUNT(CASE WHEN ra.severity = 'Warning' THEN 1 END) as warning_alert_count
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FROM risk_management.portfolios p
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LEFT JOIN risk_management.portfolio_positions pp
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ON p.id = pp.portfolio_id
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AND pp.published_at <= CURRENT_TIMESTAMP
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AND pp.removed_at IS NULL
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LEFT JOIN risk_management.risk_alerts ra
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ON p.id = ra.portfolio_id
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AND ra.published_at <= CURRENT_TIMESTAMP
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AND ra.removed_at IS NULL
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AND ra.resolved_at IS NULL
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WHERE p.published_at <= CURRENT_TIMESTAMP
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AND p.removed_at IS NULL
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GROUP BY p.id, p.snapshot_date;
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```
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---
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## Query Patterns
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### 1. Fetch Dashboard Snapshot (GET /api/dashboard/risk)
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**Source:** `dashboard_snapshots` cache OR `vw_dashboard_data` (fallback)
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```sql
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-- Try cache first (< 1 hour)
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SELECT * FROM risk_management.dashboard_snapshots
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WHERE portfolio_id = $1
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AND snapshot_date >= CURRENT_DATE - INTERVAL '1 hour'
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AND published_at <= $2
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ORDER BY published_at DESC
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LIMIT 1;
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-- Fallback: read-only view (real-time)
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SELECT * FROM risk_management.vw_dashboard_data
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WHERE portfolio_id = $1
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AND snapshot_date = CURRENT_DATE;
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```
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### 2. Refresh Dashboard on Event
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**Trigger:** PortfolioRebalanced, PortfolioMetricsCalculated, StressTestCompleted, AlertEscalated
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```sql
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INSERT INTO risk_management.dashboard_snapshots (
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portfolio_id, snapshot_date, total_portfolio_value, position_count,
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var95, sharpe_ratio, alert_warning_count, source_component, published_at
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)
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SELECT
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portfolio_id, CURRENT_DATE,
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COALESCE(total_portfolio_value, 0),
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COALESCE(position_count, 0),
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var95, sharpe_ratio, warning_alert_count,
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'event', CURRENT_TIMESTAMP
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FROM risk_management.vw_dashboard_data
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WHERE portfolio_id = $1
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ON CONFLICT (portfolio_id, snapshot_date, published_at DESC)
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DO UPDATE SET
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total_portfolio_value = EXCLUDED.total_portfolio_value,
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revision = revision + 1,
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published_at = CURRENT_TIMESTAMP;
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```
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### 3. List All Positions (for dashboard visualization)
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```sql
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SELECT symbol, quantity, market_price, market_value, weight_percent
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FROM risk_management.portfolio_positions
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WHERE portfolio_id = $1
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AND published_at <= $2
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AND removed_at IS NULL
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ORDER BY weight_percent DESC;
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```
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### 4. List Active Alerts
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```sql
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SELECT alert_id, threshold_type, current_value, severity, message
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FROM risk_management.risk_alerts
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WHERE portfolio_id = $1
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AND published_at <= $2
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AND removed_at IS NULL
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AND resolved_at IS NULL
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ORDER BY severity DESC, triggered_at DESC;
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```
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---
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## Idempotency & Concurrency
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**Idempotency Key:** `(portfolio_id, snapshot_date, source_component)`
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- Cache refresh from event is idempotent (no duplicates via UPSERT)
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- Multiple concurrent API calls return same cached result
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- View queries are always consistent (no transaction isolation needed)
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---
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## Performance SLA
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| Query | Source | Latency | Cache |
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|-------|--------|---------|-------|
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| Dashboard snapshot | `dashboard_snapshots` | <100ms | 1 hour |
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| Fallback (real-time) | `vw_dashboard_data` | <500ms | — |
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| Active alerts | Direct table | <50ms | — |
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| Positions table | Direct table | <100ms | — |
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**Indexes:**
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```sql
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CREATE INDEX idx_dashboard_portfolio_date
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ON risk_management.dashboard_snapshots(portfolio_id, snapshot_date DESC);
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CREATE INDEX idx_portfolio_positions_portfolio_date
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ON risk_management.portfolio_positions(portfolio_id, trading_date DESC);
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CREATE INDEX idx_risk_alerts_portfolio_resolved
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ON risk_management.risk_alerts(portfolio_id, resolved_at, published_at DESC);
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```
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---
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## Event Publishing (Outbox Integration)
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When dashboard is refreshed, emit event for SignalR push:
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**Event: DashboardUpdated**
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```json
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{
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"eventType": "DashboardUpdated",
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"portfolioId": "550e8400-e29b-41d4-a716-446655440001",
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"changedComponents": ["riskMetrics", "activeAlerts"],
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"snapshotId": "550e8400-e29b-41d4-a716-446655440002",
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"updatedAt": "2026-08-05T10:05:00Z"
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}
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```
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Published via: `shared.outbox` → Hangfire → SignalR Hub → `DashboardHub.UpdateDashboard(portfolioId)`
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---
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## Testing Strategy
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1. **Unit:** Aggregation SQL queries (with mock data)
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2. **Integration:** Dashboard endpoint → cache hit/miss → DB fallback
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3. **E2E:** Event trigger → dashboard update → SignalR push
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4. **Golden:** Known portfolio snapshot → expected aggregates (variance <0.01%)
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---
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## Assumptions
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- All source tables (VS-04~07) maintain PIT audit trail
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- `published_at <= cutoff` enforced on all source reads
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- Cache TTL managed by application (not DB expiry)
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- SignalR hub configured separately; dashboard job just publishes event
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---
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## Migration
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**DbUp Script:** `0034_VS08_DashboardSchema.sql`
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```sql
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-- Create tables, views, indexes
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-- Seed initial cache from existing data if present
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-- Grant SELECT on views to DataReader role
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```
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