Session 12 — Storage Audit + Docker Prune + Hostinger Backup Monitor

What was built

Docker build cache pruned — reclaimed 183 GB (81% to 37% disk usage)
Weekly auto-prune cron added (Sundays 3:30 AM UTC)
Hostinger backup monitor — daily API check at 2 PM ET, WhatsApp alert if backup >36h stale
- Script at /opt/scripts/hostinger-backup-check.py
- Hostinger API token stored in .env
File-Level Database Tracking — Supabase project_files table (migration 006) with trigram search index
- 16,414 files registered across 7,077 projects (28 GB total)
- Backend: file-registry-service (CRUD, search, bulk ops, SHA-256 hashing, provenance tracking)
- Hooks: local-file-service auto-registers on upload, auto-unregisters on delete
- Frontend: FileSearch.tsx page at /file-search with filters