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>

src/KArtSell.Modules.ModelOperations/ShadowRun/Services/IOpenDartDataService.cs

@@ -0,0 +1,21 @@
+namespace KArtSell.Modules.ModelOperations.ShadowRun.Services;
+
+public interface IOpenDartDataService
+{
+    /// <summary>
+    /// Fetch financial disclosures for a corporation within date range.
+    /// </summary>
+    Task<IReadOnlyList<DisclosureItem>> GetDisclosuresAsync(
+        string corpCode,
+        DateOnly startDate,
+        DateOnly endDate,
+        CancellationToken cancellationToken);
+
+    /// <summary>
+    /// Fetch quarterly financial data for a corporation.
+    /// </summary>
+    Task<IReadOnlyList<FinancialDataItem>> GetQuarterlyFinancialsAsync(
+        string corpCode,
+        int year,
+        CancellationToken cancellationToken);
+}