Configure better-route 1.1 AtomicIdempotencyMiddleware for side-effectful POST, PUT, PATCH, or DELETE routes where concurrent duplicate execution must be prevented. Use for WpdbAtomicIdempotencyStore, lease-aware reservations, reservation_token schema migration, Idempotency-Key validation, idempotency_in_progress/conflict/replay behavior, safe stored responses, releaseOnThrowable, Woo write idempotency, or retry-safe payment/order/subscription/account operations.
