Previous commit advertised 429 on every operation. Only routes
decorated with @limiter.limit can actually return slowapi's 429 —
currently just POST /api/v1/auth/login. Documenting it elsewhere is
dishonest and would mislead clients into expecting a response the
server cannot produce.
Walk slowapi's _route_limits / _dynamic_route_limits registries to
identify decorated endpoints, match them to FastAPI routes by
{module}.{name}, and only inject 429 on those.
Existing per-route 429 declarations (e.g. SSE connection-cap on
events streams via sse_limits) are untouched.
anti
9b1168ce0b