QueueDeathClassifier typedef
QueueDeathClassifier =
QueueDeath? Function(ErrorEvent event)
Classifies an error event into a queue death, or null when the chain must NOT advance (content_filter family, user abort) and the error surfaces verbatim (issue #418: advance on ANY provider death, never on safety stops).
Implementation
typedef QueueDeathClassifier = QueueDeath? Function(ErrorEvent event);