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/kube-prometheus-stack-config/httproute.yaml

@@ -0,0 +1,20 @@
+apiVersion: gateway.networking.k8s.io/v1
+kind: HTTPRoute
+metadata:
+  name: grafana
+  namespace: monitoring
+spec:
+  parentRefs:
+    - name: envoy-gateway
+      namespace: envoy-gateway-system
+  hostnames:
+    - "grafana.fireflylab.local"
+  rules:
+    - matches:
+        - path:
+            type: PathPrefix
+            value: /
+      backendRefs:
+        # verify with: kubectl get svc -n monitoring
+        - name: kube-prometheus-stack-grafana
+          port: 80