Confirm Upload

Confirm that a file was successfully uploaded to R2.

Call this endpoint after successfully uploading a file using the presigned URL from /upload. This will verify the file exists in R2, get the actual file size, and mark it as completed.

Accepts either integer file_id (e.g., “4”) or hashid (e.g., “npl94jxy”).

This makes the file available for use in workflows.