Add logging with timestamps to scheduled backup script

- Add log file at backups/scheduled-backup.log (overwritten on each run)
- Create log() function that outputs to both console and log file
- Add timestamp prefix to all log messages in format [YYYY-MM-DD HH:MM:SS]
- Replace all echo statements with log function calls

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

db-scheduled-backup.sh

@@ -6,30 +6,41 @@ set -euo pipefail
 
 SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 BACKUP_SCRIPT="$SCRIPT_DIR/db-backup-standalone.sh"
+LOG_FILE="$SCRIPT_DIR/backups/scheduled-backup.log"
+
+# Initialize log file (overwrite if exists)
+mkdir -p "$(dirname "$LOG_FILE")"
+> "$LOG_FILE"
+
+# Function to log messages
+log() {
+  local timestamp=$(date '+%Y-%m-%d %H:%M:%S')
+  echo "[$timestamp] $*" | tee -a "$LOG_FILE"
+}
 
 # Ensure the backup script exists and is executable
 if [ ! -f "$BACKUP_SCRIPT" ]; then
-  echo "Error: Backup script not found at $BACKUP_SCRIPT"
+  log "Error: Backup script not found at $BACKUP_SCRIPT"
   exit 1
 fi
 
 if [ ! -x "$BACKUP_SCRIPT" ]; then
-  echo "Making backup script executable..."
+  log "Making backup script executable..."
   chmod +x "$BACKUP_SCRIPT"
 fi
 
 # Run the backup
-echo "Starting database backup..."
+log "Starting database backup..."
 "$BACKUP_SCRIPT"
 
 # Delete backups older than 7 days
 BACKUP_DIR="${BACKUP_DIR:-backups}"
 if [ -d "$BACKUP_DIR" ]; then
-  echo "Cleaning up backups older than 7 days in $BACKUP_DIR..."
+  log "Cleaning up backups older than 7 days in $BACKUP_DIR..."
   find "$BACKUP_DIR" -name "mongo-volume-backup-*.tar.gz" -type f -mtime +7 -delete
-  echo "Cleanup completed."
+  log "Cleanup completed."
 else
-  echo "Warning: Backup directory $BACKUP_DIR not found, skipping cleanup."
+  log "Warning: Backup directory $BACKUP_DIR not found, skipping cleanup."
 fi
 
-echo "Scheduled backup completed successfully."
+log "Scheduled backup completed successfully."