7b5494bafb
- Change default `version` param from 'original' to 'processed' so
GET /api/files/{id}/download (no param) returns the processed file
- Update docstring to reflect new default
- Add tests: ?version=processed, default→processed, invalid→400
- Fix test_file_download_missing_mime_type to use explicit ?version=original
- Add File Download section to docs/API.md
Co-authored-by: christianlouis <361235+christianlouis@users.noreply.github.com>