feat: export all K8 Plus cluster manifests

Namespaces: argocd, authentik, backup-system, cloudflare-ddns,
gitea, homarr, monitoring, n8n, openclaw, polymarket-bot, vaultwarden
Cluster-wide: clusterissuers, namespaces
Secrets: redacted (structure only, data=REDACTED)

monitoring/configmap-kube-prometheus-stack-grafana-datasource.yaml

@@ -0,0 +1,26 @@
+apiVersion: v1
+data:
+  datasource.yaml: "apiVersion: 1\ndatasources:\n- name: \"Prometheus\"\n  type: prometheus\n\
+    \  uid: prometheus\n  url: http://kube-prometheus-stack-prometheus.monitoring:9090/\n\
+    \  access: proxy\n  isDefault: true\n  jsonData:\n    httpMethod: POST\n    timeInterval:\
+    \ 30s\n- name: \"Alertmanager\"\n  type: alertmanager\n  uid: alertmanager\n \
+    \ url: http://kube-prometheus-stack-alertmanager.monitoring:9093/\n  access: proxy\n\
+    \  jsonData:\n    handleGrafanaManagedAlerts: false\n    implementation: prometheus"
+kind: ConfigMap
+metadata:
+  annotations:
+    meta.helm.sh/release-name: kube-prometheus-stack
+    meta.helm.sh/release-namespace: monitoring
+  labels:
+    app: kube-prometheus-stack-grafana
+    app.kubernetes.io/instance: kube-prometheus-stack
+    app.kubernetes.io/managed-by: Helm
+    app.kubernetes.io/part-of: kube-prometheus-stack
+    app.kubernetes.io/version: 83.2.0
+    chart: kube-prometheus-stack-83.2.0
+    grafana_datasource: '1'
+    heritage: Helm
+    release: kube-prometheus-stack
+  name: kube-prometheus-stack-grafana-datasource
+  namespace: monitoring
+