Finalize a shipment attachment after direct upload.
This is step 2 of the shipment attachment workflow.
Validation pipeline:
imageId matches the expected shipment attachment URN.Responses:
451 when moderation rejects the image.400/403/404 for invalid ID, disabled uploads, or missing shipment.Bearer authentication header of the form Bearer <token>, where <token> is your auth token.
Image identifier to finalize upload
Image identifier
Hide attachment from the buyer