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/secret-uptime-kuma-tls.yaml

@@ -0,0 +1,21 @@
+apiVersion: v1
+data:
+  tls.crt: REDACTED
+  tls.key: REDACTED
+kind: Secret
+metadata:
+  annotations:
+    cert-manager.io/alt-names: home.chemavx.xyz,status.chemavx.xyz
+    cert-manager.io/certificate-name: uptime-kuma-tls
+    cert-manager.io/common-name: status.chemavx.xyz
+    cert-manager.io/ip-sans: ''
+    cert-manager.io/issuer-group: cert-manager.io
+    cert-manager.io/issuer-kind: ClusterIssuer
+    cert-manager.io/issuer-name: letsencrypt-prod
+    cert-manager.io/uri-sans: ''
+  labels:
+    controller.cert-manager.io/fao: 'true'
+  name: uptime-kuma-tls
+  namespace: monitoring
+type: kubernetes.io/tls
+