- Remove unreliable URL pass-through strategy (image_url field)
- Always download and upload images as File objects
- Get MIME type from HTTP response headers for URLs
- Use File constructor (not just Blob) for proper multipart metadata
- Add comprehensive error logging with headers and file metadata
- Simplify to single reliable upload path
Fixes 400 'Upload a valid image' error caused by Blob not providing
proper filename/MIME metadata in multipart form data.
User's Tandoor instance uses Bearer token authentication (likely JWT)
rather than Django REST Framework's Token authentication.
Reverts authentication from 'Token' back to 'Bearer' to fix 403 error:
'Authentication credentials were not provided.'
- Fix authentication header from 'Bearer' to 'Token' (DRF TokenAuth)
- Implement three-strategy upload system:
1. URL pass-through for direct URLs (most efficient)
2. Base64 data URL conversion for screenshots
3. Fallback blob upload for any other format
- Add comprehensive error handling with response details
- Add detailed logging for debugging upload strategies
- Document thumbnail formats in extractThumbnailStealth()
Fixes#30 - Tandoor image upload 400 Bad Request error
Based on Tandoor source code analysis (cookbook/views/api.py):
- RecipeImageSerializer accepts 'image_url' field for server-side download
- Uses Token authentication, not Bearer
- Supports multipart file upload with proper MIME types
