OptionalCompletedISO 8601 timestamp when the phase completed (present only if Status === 'completed').
OptionalErrorError message from the phase failure (present only if Status === 'failed').
OptionalFailedISO 8601 timestamp when the phase failed (present only if Status === 'failed').
Current lifecycle status of the phase.
Serialized state of a single installer phase within the checkpoint file.
See
InstallStateData — the parent object that maps phase IDs to states.