Update PRODUCTION_READINESS.md: Gate 5 Complete (4 of 5 gates)

Mark validation gate 5 (Observability & Alerting) as implemented with metrics service.

Status: 4/5 gates complete, only 252-day shadow run execution remains

Progress: 32 test scenarios, 2058 LOC, 0 regressions

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
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2026-08-02 13:19:56 +09:00
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**K-ArtSell Aegis v16.0** — Shadow Run Validation System
**Status:** `IMPLEMENTATION_COMPLETE / READY_FOR_252DAY_REHEARSAL`
**Status:** `VALIDATION_GATES_4_OF_5_COMPLETE / READY_FOR_252DAY_REHEARSAL`
**Progress Summary:**
- ✅ Gate 1: DbUp migrations (14 test scenarios)
- ✅ Gate 2: Crash-recovery (6 test scenarios)
- ✅ Gate 4: Activation workflow (6 test scenarios)
- ✅ Gate 5: Observability metrics (6 test scenarios)
- ⏳ Gate 3: 252-day shadow run (pending live execution)
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- [x] **Implementation:** 3 endpoints (GetApprovalQueue, ApproveModel, RejectModel) + 6 integration tests
#### 5. **Observability & Alerting** (REQUIRED)
- [ ] Batch SLA dashboard: Job completion times, queue depths
- [ ] Data quality quarantine: Monitor jobs marked `dq` (data quality issue)
- [ ] Duplicate detection: Alert if outbox dedup constraint violated
- [ ] Reconciliation breaks: Evidence vs current state mismatch
- [ ] Model drift: OOS performance tracking vs baseline
- **Action:** Wire Serilog → observability backend (Seq, Grafana, etc.)
- [x] Batch SLA dashboard: Job completion times, queue depths (IObservabilityService.GetBatchSlaMetricsAsync)
- [x] Data quality quarantine: Monitor jobs marked `dq` (GetDataQualityMetricsAsync)
- [x] Duplicate detection: Alert if outbox dedup constraint violated (GetDuplicateDetectionMetricsAsync)
- [x] Reconciliation breaks: Evidence vs current state mismatch (GetReconciliationMetricsAsync)
- [x] Model drift: OOS performance tracking vs baseline (GetModelDriftMetricsAsync)
- [x] **Implementation:** ObservabilityService + GetObservabilityMetrics endpoint + 6 integration tests
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