List matches

Authorized historical Matches for a Subscription. Stable keyset page cursor, not a Change Cursor. Absence of a Match does not distinguish an evaluator still working from a negative result. A page containing evidence reclaimed by history_retention.alert_detail returns 410 evidence_expired, retryable=false, with resync_url to explicitly resume after the expired Match. Resuming accepts a lost history interval; export evidence before retention expires if needed. Successful pages retain the original evidence and response shape.