mitigate cluster instability during terraform applies

- Recreate strategy for heavy single-replica deployments (onlyoffice, stirling-pdf)
- Reduce maxSurge on multi-replica deployments (traefik, authentik, grafana, kyverno)
  to prevent memory request surge overwhelming scheduler
- Weekly etcd defrag CronJob (Sunday 3 AM) to prevent fragmentation buildup
- Disable Kyverno policy reports (ephemeral report cleanup)
- Cloud-init: journald persistence + 4Gi swap for worker nodes
- Kubelet: LimitedSwap behavior for memory pressure relief

stacks/platform/modules/monitoring/grafana_chart_values.yaml

@@ -1,5 +1,8 @@
 deploymentStrategy:
   type: RollingUpdate
+  rollingUpdate:
+    maxSurge: 0
+    maxUnavailable: 1
 replicas: 2
 adminPassword: "${grafana_admin_password}"
 resources: