OptionalEnvironmenttrue when an expired lease on the final attempt dead-letters as 'LeaseExpired' (Database-like).
waitSeconds passed to Receive (eventually consistent transports need > 0).
true for SQS-like transports where Release consumes a receive (attempt).
Cases the TEST ENVIRONMENT cannot run faithfully, keyed by case Id with the reason. For a transport whose emulator diverges from the real service (LocalStack does not expire SQS receipt handles, so stale-lease fencing cannot be observed there). The case is reported Skipped with the reason; it is never a statement about the transport, whose real behaviour must be confirmed against the service itself.