feat: CNPG PodMonitor, OpenBao ServiceMonitor, CLI OIDC client CRD

- CNPG PodMonitor for PostgreSQL cluster metrics
- OpenBao ServiceMonitor for vault metrics scraping
- Sunbeam CLI OAuth2Client CRD (moved from seed to declarative)

base/data/cnpg-podmonitor.yaml

@@ -0,0 +1,14 @@
+apiVersion: monitoring.coreos.com/v1
+kind: PodMonitor
+metadata:
+  name: cnpg-postgres
+  namespace: data
+  labels:
+    release: kube-prometheus-stack
+spec:
+  selector:
+    matchLabels:
+      cnpg.io/cluster: postgres
+  podMetricsEndpoints:
+    - port: metrics
+      interval: 30s