User Organization Images Partial Update

Update image asset metadata or replace an image.

Request format (JSON):

• old_url: URL of the image to update (required)
• new_filename: New filename for the image (optional)
• image_data: Base64 encoded new image data (optional, for replacement)
• content_type: MIME type for new image (optional)

Returns:

• 200: Image updated successfully
• 400: Invalid request
• 404: Image not found
• 500: Update failed