Ch14 Sol4b: restore replay that cannot resurrect

Ch14 Sol4b: restore replay that cannot resurrect A sequence diagram generated by Archify. sweep expired (hold-checked) tombstone u1, u3 watermarks durable hash receipts restore 180-day snapshot replay through tombstones u1, u3 deleted: skip live rows only u5 live, 0 resurrected restore record Purge sweep Restore replay Operator · restore request · Sequence participant Operator restore request Retention sweeper · periodic job · Sequence participant Retention sweeper periodic job Live store · records + views · Sequence participant Live store records + views Tombstone log · deletion watermarks · Sequence participant Tombstone log deletion watermarks Backup · 180-day snapshot · Sequence participant Backup 180-day snapshot Audit log · hash receipts · Sequence participant Audit log hash receipts Legend main request return security async trace message