Phase 7 — End-to-end HTTP Tests

What's included

Full HTTP-level verification of every endpoint — not just the underlying flow
logic, but the actual request/response cycle through FastAPI's routing,
dependency injection, and validation layers.

390 tests passing across all seven phases. The library is now fully built
and verified end-to-end.

Next

PyPI publish pipeline → first real pip install → test project → v1.0