Add Borg local sync system service and configuration

config/ansible/templates/borg-local-sync.timer.j2

@@ -0,0 +1,17 @@
+[Unit]
+Description=Run Borg Local Sync daily
+Documentation=man:borg(1)
+Requires=borg-local-sync.service
+
+[Timer]
+# Run daily at 3:00 AM (1 hour after main backup at 2:00 AM)
+OnCalendar=*-*-* 03:00:00
+# Add randomization to prevent conflicts if multiple systems exist
+RandomizedDelaySec=300
+# Ensure timer persists across reboots
+Persistent=true
+# Wake system from suspend if needed
+WakeSystem=false
+
+[Install]
+WantedBy=timers.target