Design and review integration tests that exercise FastAPI route handlers, service-layer orchestration, and real SQLAlchemy/PostgreSQL interaction together — as opposed to isolated unit tests or full browser E2E tests. Use when adding a new API endpoint, reviewing whether a module's tests actually verify DB-level behavior (constraints, cascades, transactions), or when the user asks "do we have integration coverage for X." This project already has 199 passing tests across unit/integration/security/IDOR/concurrency layers — use this skill to extend that integration layer specifically, not to replace it.
