Three independent improvements that fix real browser-facing bugs:
1. CORS: allow 127.0.0.1:5173 in addition to localhost:5173. Both
resolve to the same Vite dev server but CORS treats them as distinct
origins, so tabs opened via the IP form silently break.
2. CORS: support CYCLONE_ALLOWED_ORIGINS env var (comma-separated) for
LAN / staging hosts. The middleware reads it at module import.
3. Catch-all exception handler: returns JSON 500 with CORS headers
instead of a bare Uvicorn text/plain response. Without this, any
unhandled exception is misreported by browsers as a CORS error
because the body can't be read without the allow-origin header.
4. IntegrityError → 409: when (batch_id, patient_control_number) is
UNIQUE-constrained and a duplicate collides, return 409 with the
batch id instead of letting the exception 500. Same problem as (3)
for the most common ingest failure mode.
Tests added:
- test_cors_headers_present_for_loopback_ip
- test_cors_extra_origins_via_env (uses importlib.reload because the
allow-list is built at module import)
Tyler
b6607b2009