b6b401c879
Also from the Task 3 review: FailedSubscribeResponse_IsRetried guards the failure path again (large ceiling); HandleSubscribeTagsResponse reads state instead of get-or-create; SubscribeToDcl prunes stale retry state on re-entry; doc comments refreshed. Claude-Session: https://claude.ai/code/session_019ZxXT5sxZs5XrtdwYzJDPV