Admin-only takeover door for the destroyed-device case: releases the match's active claim regardless of who holds it, bumping the writer epoch. The superseded device's next event flush gets 409 stale_claim; the replacement device bootstraps from GET scoring_events and continues at acked_seq + 1.

Unlike PATCH /v1/matches/{id}/release this deliberately leaves the match in_progress, since a takeover means scoring continues on another device.