feat: add new emails and filter direct admission marketing
Added 2 new emails from 2025-12-11 export:
- Cedarville scholarship opportunity (approved - specific application)
- Cornerstone direct admission marketing (filtered)
Updated classifier to exclude "direct admit/admission" emails that
ask to complete a profile (marketing, not actual acceptance).
Test results: 100% accuracy on all 67 labeled emails.
💘 Generated with Crush
Assisted-by: Claude Sonnet 4.5 via Crush <crush@charm.land>