fix(argocd): add ignoreDifferences to root app to stop Application CRD drift loop

The k3s-cluster-root app-of-apps has been in a continuous Synced<->OutOfSync
oscillation (489 transitions in 24h). Each cycle, ArgoCD syncs the 'argocd'
Application CRD, succeeds, then immediately detects drift because ArgoCD
adds status/operation fields to Application resources at runtime.

Adding ignoreDifferences for /status and /operation on Application resources
stops the drift loop while keeping the app-of-apps functional.

argocd-bootstrap.yaml

@@ -22,3 +22,9 @@ spec:
       selfHeal: true
     syncOptions:
       - CreateNamespace=false
+  ignoreDifferences:
+    - group: argoproj.io
+      kind: Application
+      jsonPointers:
+        - /status
+        - /operation