Excel Mapper — v2

1. EXTRACT    → scripts/extract_map.py   (raw JSON)
2. CLASSIFY   → auto-detect type + sheet roles
3. CLARIFY    → ask only when ambiguous (max 3 questions)
4. RENDER     → scripts/render_map.py   (Markdown files)
5. PRESENT    → give files + load index into context

Step 1 — Extract

ls /mnt/user-data/uploads/
python scripts/extract_map.py "/mnt/user-data/uploads/<FILE>" "/tmp/workbook_data.json"

Step 2 — Classify