Updates for grafana stack

scripts/provision.sh

@@ -13,6 +13,10 @@ Usage: $(basename "$0") [HOST] [OPTIONS]
 
 Provision server(s) with site.yml.
 
+Applies: common, ufw, docker, nodejs, gitea-key, tianji, alloy (every host).
+On ai-server-4080 also: observability (Loki + Prometheus + Grafana) when
+observability_stack is true in host_vars.
+
   HOST              Optional. Limit to one host: adama, roslin, or ai-server-4080.
                     Omit to run against all webservers.
 
@@ -25,9 +29,9 @@ Options:
 
 Examples:
   $(basename "$0") adama --check    # dry run on adama only
-  $(basename "$0") adama            # provision adama
+  $(basename "$0") adama            # provision adama (includes Alloy)
   $(basename "$0") adama --ask-pass  # first SSH login before ssh-copy-id
-  $(basename "$0") ai-server-4080   # provision the control node
+  $(basename "$0") ai-server-4080   # control node + Loki/Prometheus/Grafana
   $(basename "$0")                  # provision all hosts
 EOF
 }