feat: NFS provisioner + persistance Prometheus et Grafana

- k8s/infra/nfs-provisioner/ : nfs-subdir-external-provisioner v4.0.18
  StorageClass "nfs" (default), ReclaimPolicy=Retain, server=192.168.10.1
  path=/srv/data/nfs/k8s (export RAID5 déjà existant)
- k8s/apps-of-apps/apps/nfs-provisioner.yaml : Application ArgoCD
- monitoring/values.yaml : persistance activée
  Prometheus: 20Gi sur nfs, Grafana: 2Gi sur nfs

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

k8s/apps-of-apps/apps/nfs-provisioner.yaml

@@ -0,0 +1,22 @@
+apiVersion: argoproj.io/v1alpha1
+kind: Application
+metadata:
+  name: nfs-provisioner
+  namespace: argocd
+  finalizers:
+    - resources-finalizer.argocd.argoproj.io
+spec:
+  project: default
+  source:
+    repoURL: git@github.com:Alkatrazz24/Funk-lab.git
+    targetRevision: main
+    path: k8s/infra/nfs-provisioner
+  destination:
+    server: https://kubernetes.default.svc
+    namespace: nfs-provisioner
+  syncPolicy:
+    automated:
+      prune: true
+      selfHeal: true
+    syncOptions:
+      - CreateNamespace=true