Live catalog of every v2 route

Introspects the running FastAPI sub-app and returns one entry per route with path, HTTP methods, tag, summary, description, and the parameter list. Each parameter carries its name, location (query / path / header), required flag, type, default, numeric bounds (if any), and enum array when the parameter is Literal-typed.

Derived from in-memory route metadata — no Redis or DB I/O. Requires X-API-Key. For totally anonymous discovery use /v2/openapi.json (FastAPI built-in).