David Blanc Brioir b70b796ef8 feat: Add multi-file batch upload with sequential processing ...

Implements comprehensive batch upload system with real-time progress tracking:

Backend Infrastructure:
- Add batch_jobs global dict for batch orchestration
- Add BatchFileInfo and BatchJob TypedDicts to utils/types.py
- Create run_batch_sequential() worker function with thread.join() synchronization
- Modify /upload POST route to detect single vs multi-file uploads
- Add 3 batch API routes: /upload/batch/progress, /status, /result
- Add timestamp_to_date Jinja2 template filter

Frontend:
- Update upload.html with 'multiple' attribute and file counter
- Create upload_batch_progress.html: Real-time dashboard with SSE per file
- Create upload_batch_result.html: Final summary with statistics

Architecture:
- Backward compatible: single-file upload unchanged
- Sequential processing: one file after another (respects API limits)
- N parallel SSE connections: one per file for real-time progress
- Polling mechanism to discover job IDs as files start processing
- 1-hour timeout per file with error handling and continuation

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

2026-01-08 22:41:52 +01:00

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