fix: increase kyverno background controller memory to 512Mi

The default 128Mi limit causes OOMKill when processing policies
across many namespaces on bare metal clusters.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: butler54

values-baremetal.yaml

@@ -231,6 +231,10 @@ clusterGroup:
           value: "false"
         - name: reportsController.enabled
           value: "false"
+        - name: backgroundController.resources.limits.memory
+          value: "512Mi"
+        - name: backgroundController.resources.requests.memory
+          value: "256Mi"
 
     coco-kyverno-policies:
       name: coco-kyverno-policies