feat: beta API integration test suite — 85 new tests across 6 modules

Extends integration test coverage from 108 to 193 tests for the beta gate.

New test modules:
- test_query_api_extended.py (33 tests): documents, evidence, macro/competitive, ops/admin, agents, analytics
- test_registry_write_paths.py (16 tests): write paths, validation, duplicates, competitor/exposure CRUD
- test_risk_approval_lifecycle.py (8 tests): evaluation edge cases, full approval lifecycle
- test_trading_extended.py (12 tests): config round-trips, decision filtering, override validation
- test_cross_service_roundtrip.py (4 tests): cross-service data consistency
- test_error_handling.py (12 tests): 404s, 422s, empty states, health checks

Seed script extended with watchlists, approvals, lockouts, notifications,
ingestion runs, saved queries, and daily risk snapshots.

.kiro/specs/beta-api-test-suite/.config.kiro

@@ -0,0 +1 @@
+{"specId": "e433350c-baf0-4f4f-a30e-3724f6654090", "workflowType": "requirements-first", "specType": "feature"}