feat: automatic database backup with retention (STY-94) - #16
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Backend (manager): - internal/backup: SQLite VACUUM INTO online snapshot + gzip (BestCompression) + Prune retention (neuralwire-*.db.gz) - GET /api/admin/backup: admin download backup on demand (auth) - Automatic backup at startup then every BACKUP_INTERVAL_HOURS (default 24h), retention BACKUP_RETENTION (default 7) - Config: BACKUP_DIR/BACKUP_RETENTION/BACKUP_INTERVAL_HOURS; Docker/compose point backups at the persistent volume - NewsRepository.DB() exposes *sql.DB for the backup service Verified: backup startup works (733KB -> 179KB gzip), on-demand download 200, gzip valid SQLite, all tests pass.
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STY-94 — Backup database otomatis.\n\n- VACUUM INTO online snapshot + gzip + retention pruning\n- GET /api/admin/backup (on-demand download)\n- Auto backup at startup + every 24h, keep 7\n- Config: BACKUP_DIR, BACKUP_RETENTION, BACKUP_INTERVAL_HOURS\n\nVerified: 733KB -> 179KB gzip, valid SQLite, tests pass.