Add jarvis-backup.sh — daily mysqldump with 7-day retention

Backup script was never migrated when JARVIS moved from DO to VM 211.
Runs daily at 3am, stores compressed dumps in /var/backups/jarvis/,
logs to /var/log/jarvis/backup.log.

deploy/jarvis-backup.sh

@@ -0,0 +1,27 @@
+#!/bin/bash
+# JARVIS database backup — runs daily, 7-day retention
+# Lives in repo at /var/www/jarvis/deploy/jarvis-backup.sh
+
+BACKUP_DIR="/var/backups/jarvis"
+LOG="/var/log/jarvis/backup.log"
+DB_NAME="jarvis_db"
+DB_USER="jarvis_user"
+DB_PASS="J4rv1s_Pr0t0c0l_2026!"
+TIMESTAMP=$(date +"%Y%m%d_%H%M%S")
+OUTFILE="$BACKUP_DIR/${DB_NAME}_${TIMESTAMP}.sql.gz"
+
+mkdir -p "$BACKUP_DIR"
+
+echo "[$(date)] Starting backup..." >> "$LOG"
+
+if mysqldump -u"$DB_USER" -p"$DB_PASS" "$DB_NAME" | gzip > "$OUTFILE"; then
+    SIZE=$(du -sh "$OUTFILE" | cut -f1)
+    echo "[$(date)] Backup OK: $OUTFILE ($SIZE)" >> "$LOG"
+else
+    echo "[$(date)] ERROR: mysqldump failed" >> "$LOG"
+    exit 1
+fi
+
+# 7-day retention
+find "$BACKUP_DIR" -name "${DB_NAME}_*.sql.gz" -mtime +7 -delete
+echo "[$(date)] Cleanup done. Files kept: $(ls $BACKUP_DIR | wc -l)" >> "$LOG"