For generative creatives: set to 'approved' to finalize, 'rejected' to request regeneration with updated assets/message. Omit for non-generative creatives (system will set based on processing state).
For generative creatives: set to 'approved' to finalize, 'rejected' to request regeneration with updated assets/message. Omit for non-generative creatives (system will set based on processing state).