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)

argocd/secret-gitea-k8s-manifests.yaml

@@ -0,0 +1,19 @@
+apiVersion: v1
+data:
+  insecure: REDACTED
+  password: REDACTED
+  type: REDACTED
+  url: REDACTED
+  username: REDACTED
+kind: Secret
+metadata:
+  annotations:
+    kubectl.kubernetes.io/last-applied-configuration: '{"apiVersion":"v1","kind":"Secret","metadata":{"annotations":{},"labels":{"argocd.argoproj.io/secret-type":"repository"},"name":"gitea-k8s-manifests","namespace":"argocd"},"stringData":{"insecure":"true","password":"GitAdmin2026x","type":"git","url":"https://git.chemavx.xyz/chemavx/k8s-manifests","username":"chemavx"},"type":"Opaque"}
+
+      '
+  labels:
+    argocd.argoproj.io/secret-type: repository
+  name: gitea-k8s-manifests
+  namespace: argocd
+type: Opaque
+