- New test_existing_endpoints_require_auth.py: spot-check that existing
/api/* endpoints now require auth (gated via Depends(matrix_gate)) when
AUTH_DISABLED is False. Health remains public.
- conftest.py: flip AUTH_DISABLED=True for the suite so the legacy
pre-auth tests keep passing without login. Auth tests flip it back
off via their own autouse fixture (now patched to use monkeypatch
for cleanup).
Verified: 53 auth tests pass; 222 pre-existing non-auth failures are
unchanged.
Nora