Surface: real T3 server and CLI, synthetic local ACP provider Side: after Commit: 30e352a88e6f833abe67a28f744602e9743fb363 Fresh isolated database; no copied state RETENTION provider notification 1 decoded and queued RETENTION provider notification 2 decoded and queued RETENTION consumer received 1 RETENTION consumer BLOCKED handling 1; notification 2 remains unread RETENTION provider notification 3 decoded and queued RETENTION provider notification 4 decoded and queued RETENTION provider notification 5 decoded and queued RETENTION releasing slow consumer after 3,4 (6 Mi characters each) and 5 (tiny) queued RETENTION consumer received 3 RETENTION consumer received 4 RETENTION consumer received 5 RETENTION FINAL delivered=[1,3,4,5]