Storage metadata the worker returns for each attachment it persisted while handling a request (R2 backend only).
ISO 8601 expiry of the stored file.
The ChatAttachment.id this entry describes.
Worker storage key to reference the file on later turns.
Optional
Signed preview/download URL, when the worker can serve the file.
Storage metadata the worker returns for each attachment it persisted while handling a request (R2 backend only).