Updates for grafana stack

README.md

@@ -22,10 +22,13 @@ exit
 # Test connectivity to one host
 ansible adama -m ping
 
-# Provision one host (dry run first)
+# Provision one host (dry run first) — includes Alloy log/metrics agent
 ./scripts/provision.sh adama --check
 ./scripts/provision.sh adama
 
+# Control node: Alloy + Loki + Prometheus + Grafana
+./scripts/provision.sh ai-server-4080
+
 # Provision all hosts
 ./scripts/provision.sh
 ```
@@ -34,6 +37,9 @@ See [IMPLEMENTATION.md](IMPLEMENTATION.md) for full architecture, CI/CD plan, an
 
 Observability (Alloy → Loki / Prometheus → Grafana): [docs/OBSERVABILITY.md](docs/OBSERVABILITY.md) · [docs/GRAFANA_USAGE.md](docs/GRAFANA_USAGE.md)
 
+Provision installs **Alloy** on every host. On **ai-server-4080** it also starts
+the central **Loki / Prometheus / Grafana** stack (`observability_stack: true`).
+
 ## Servers
 
 | Host | IP | Role |