Response from creative sync operation. Exactly one of three shapes: (1) synchronous success — per-creative results in the creatives array (best-effort processing with per-item status/failures); (2) terminal failure — errors array with no creatives processed; (3) submitted task envelope — status 'submitted' with task_id when the whole operation is queued (batch ingestion, async review that must settle before per-item results can be issued). The submitted branch MAY carry advisory errors for non-blocking warnings; terminal failures belong in the error branch. Final per-item results land on the task completion artifact, not this envelope. These three shapes are mutually exclusive — a response has exactly one.
Response from creative sync operation. Exactly one of three shapes: (1) synchronous success — per-creative results in the creatives array (best-effort processing with per-item status/failures); (2) terminal failure — errors array with no creatives processed; (3) submitted task envelope — status 'submitted' with task_id when the whole operation is queued (batch ingestion, async review that must settle before per-item results can be issued). The submitted branch MAY carry advisory errors for non-blocking warnings; terminal failures belong in the error branch. Final per-item results land on the task completion artifact, not this envelope. These three shapes are mutually exclusive — a response has exactly one.