feat(openclaw): deploy OpenClaw AI chatbot gateway on VM 120

- Add Docker Compose configs with security hardening (cap_drop ALL, non-root, read-only FS)
- Add Prometheus node_exporter scrape target for 192.168.2.120:9100
- Update services/README.md, INDEX.md, and CLAUDE_STATUS.md with VM 120
- Image pinned to v2026.2.1 (patches CVE-2026-25253)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

monitoring/prometheus/prometheus.yml

@@ -15,3 +15,11 @@ scrape_configs:
         target_label: instance
       - target_label: __address__
         replacement: 192.168.2.114:9221 #PVE Exporter Address
+
+  - job_name: 'openclaw-node'
+    static_configs:
+      - targets:
+        - 192.168.2.120:9100
+        labels:
+          instance: openclaw
+          vm_id: '120'