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.
