CallStatus

One call's whole life, in the one vocabulary every Resia call read uses.

queued covers a call from acceptance until the voice platform takes it — a batch call while it waits its turn in the drain, and any call in the short window before the platform accepts it. The voice platform's own execution states map into the middle of the sequence. canceled is reachable only from queued: a batch cancel stops calls that were never dialed, and a call already being placed runs to its own end. unknown is the one non-terminal exception to the sequence: the platform holds the call, but its live status could not be read this instant.