- Discover /creations/resourceConvert endpoint via browser inspection
- Add resource_convert() method to api.py and api_complete.py
- Extend MODEL_FORMAT_KEYS with fbx, stl, usdz, mp4, gif
- Update get_model_urls() and download_model() with include_converted flag
- Update CLI with --converted flag for formats and download commands
- Update reverse engineering docs with native vs converted format tables