Workstream G: Implement AEG-X-009 P1-P6 (KRX/OpenDart/KIS API integration)
- P1: KRX OpenAPI service (indices, stocks, OHLCV data)
- P2: OpenDart API service (company disclosures, quarterly financials)
- P3: KIS API service (trading orders, portfolio holdings)
- P4-P6: Daily scheduling, error classification, SLA tracking, LKG fallback
- Schema: market_data schema with append-only import logs
- Error handling: transient/permanent classification + exponential backoff
- Idempotency: correlation_id deduplication for safe replay
- Services: 3 independent data services with caching, retry logic
- Handler: Centralized import orchestration with logging
- Job: Hangfire daily scheduler (q-evaluation queue, 16:30-20:30 KST window)
- Tests: Unit & integration scenarios for import execution
- AGENTS.md v16.0 13/13 compliance ✅
Closes workstream G (Phase 2 preparation).
Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
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