Set adapter mutation, rate-limit, and secondary-storage contracts

[salasebas]

Question

For the v1.6.24 adapter deltas covering empty-predicate singular mutations, miss results, MySQL affected-row races, mixed predicates, atomic consume and counters, transaction reuse, memory isolation and bounds, SQL rate-limit pruning, Redis and Fred window TTL, GETDEL compatibility, and best-effort fallbacks, what exact RustAuth adapter contracts and minimum backend versions should ship?