Sync alumni data with CV mentorship section

- Add 46 missing undergraduate alumni (62 → 108 total)
- Add 2 missing graduate alumni (Caroline Lee, Deepanshi Shokeen)
- Sync all dates with CV (CV is authoritative)
- Reorder undergraduate alumni to match CV order

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

Author: jeremymanning