ExpectationExhaustedRecord

Delivered to the saga's event handler when an expectation's deadline has passed without a state transition. The handler must match this type and answer with a state change (typically to a domain failure or compensation state). An unhandled exhaustion is logged as an error and re-delivered one deadline period later; the framework never invents a terminal state. The original reply may still arrive after exhaustion — the escalated state's handler should decide what a late success means.