C0: switch grafana deployment to Recreate strategy

Grafana uses an RWO PVC for SQLite + Bleve search index. RollingUpdate
spawns the new pod before terminating the old one, so the new pod
crashloops on the index lock until rollout timeout. Recreate terminates
the old pod first, letting the new pod acquire the lock cleanly.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

argocd/manifests/grafana/deployment.yaml

@@ -14,7 +14,9 @@ spec:
       app.kubernetes.io/name: grafana
       app.kubernetes.io/instance: grafana
   strategy:
-    type: RollingUpdate
+    # RWO PVC for SQLite + Bleve index — RollingUpdate spawns the new pod
+    # before the old one terminates, and it crashloops on the index lock.
+    type: Recreate
   template:
     metadata:
       labels: