Check your remaining anonymous quota without consuming a call.

Read-only quota check. Doesn't increment the counter. Used by clients that want to show 'you have N free verdicts remaining' before the user types their candidate name.

Reads both the v1 fingerprint counter AND the shared per-IP monthly counter (the one /v3/check writes to), reporting the MAX so the "remaining" number matches what /v1/verify will actually enforce. See V-synthesis B1.

R2 F-02 / F-04 fix: uses the canonicalized CF-Connecting-IP bucket key, not X-Forwarded-For.