Upload image file directly to the pre-signed URL obtained from the media upload endpoint. This is a direct upload to AWS S3 using the URL returned from GET /api/media/upload-url.
API key for application authentication (format: leo_xxxxxxxxx)
Secure user token (Non-PII format: lm_usr_xxxxx) - PROPOSED: Not yet implemented
The complete pre-signed URL returned from GET /api/media/upload-url endpoint
Binary image file data
The body is of type file.
Image uploaded successfully to S3
S3 response (usually empty for successful uploads)