Transport cannot apply recoverability policies when handler execution exceeds consumer ack timeout

[bording]

While #894 fixed the transport's connection recovery problems around the newly introduced consumer acknowledgement timeout, there is still a related problem.

When a handler runs longer than the timeout value, the message is requeued by the broker and the transport will log a warning. When this happens, the message will be retried until the handler completes quicker than the timeout. No configured recoverability policies will apply.