76ab698105
- Added /api/files/{file_id}/reprocess endpoint for single file reprocessing
- Added /api/files/{file_id}/preview endpoint for viewing original/processed files
- Enhanced file detail view with process flow computation
- Updated frontend template with retry button, process flow visualization, and PDF previews
- Added JavaScript for async retry functionality
Co-authored-by: christianlouis <361235+christianlouis@users.noreply.github.com>