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/sonarqube/values.yaml

@@ -0,0 +1,17 @@
+postgresql:
+  enabled: false
+
+persistence:
+  enabled: true
+  storageClass: nfs-delete
+  size: 20Gi
+
+service:
+  type: ClusterIP
+
+resources:
+  requests:
+    cpu: 500m
+    memory: 2Gi
+  limits:
+    memory: 4Gi