Tests cover Keboola extractor (extension + legacy fallback, _remote_attach), BigQuery extractor (remote views, contract validation), Jira service (webhook processing, HMAC verification, HTTP mocking), Jira incremental transform (upsert/delete, monthly parquet partitioning), and LLM providers (factory, AnthropicExtractor retry/auth, OpenAICompatExtractor strategy cascade, JSON extraction helpers). Also adds tests/helpers/factories.py with WebhookEventFactory.
- Add close_system_db() function in src/db.py to cleanly close shared DB connection - Add lifespan context manager in app/main.py to trigger shutdown on app exit - Integrate lifespan into FastAPI app initialization - All API tests pass (77/77)
