feat: P0 backup system (WAL+snapshot+restore+verify), monitoring stack, admin health API

scripts/backup/install-crontab.sh

@@ -0,0 +1,25 @@
+#!/bin/bash
+# Install crontab entries for automated backups
+# Usage: sudo bash install-crontab.sh
+
+CRON_FILE="/opt/memento/backups/crontab"
+
+cat > "$CRON_FILE" << 'EOF'
+# Memento Backup Schedule
+# Snapshots every 6 hours
+0 */6 * * * /opt/memento/scripts/backup/backup.sh >> /opt/memento/backups/backup.log 2>&1
+
+# Backup verification every 6 hours (offset by 30min)
+30 */6 * * * /opt/memento/scripts/backup/verify-backups.sh >> /opt/memento/backups/backup.log 2>&1
+
+# Offsite sync daily at 03:00
+0 3 * * * /opt/memento/scripts/backup/offsite-sync.sh >> /opt/memento/backups/backup.log 2>&1
+EOF
+
+echo "Crontab file created at $CRON_FILE"
+echo ""
+echo "To install, run as the memento user:"
+echo "  crontab $CRON_FILE"
+echo ""
+echo "To verify:"
+echo "  crontab -l"