feat: add vault, external-secrets, monitoring, harbor, jenkins, sonarqube, headlamp

Two-source ArgoCD Applications (upstream chart + values from this repo),
same pattern as cluster-bootstrap. Each service paired with a *-config
Application for HTTPRoute/RBAC/ClusterSecretStore that must exist
after the main install (separate sync wave).

Chart targetRevision pins and HTTPRoute backendRef service names are
best-effort - marked TODO/verify in-file since no live helm repo access
this session to confirm current versions or actual rendered svc names.

manifests/headlamp-config/rbac.yaml

@@ -0,0 +1,18 @@
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: headlamp-admin
+  namespace: headlamp
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRoleBinding
+metadata:
+  name: headlamp-admin
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: cluster-admin
+subjects:
+  - kind: ServiceAccount
+    name: headlamp-admin
+    namespace: headlamp