Refactor backup configuration in Grafana values.yaml to use barman-cloud plugin and update scheduled backup settings

apps/monitoring/grafana/values.yaml

@@ -179,9 +179,19 @@ grafana:
           memory: 100Mi
         limits:
           memory: 512Mi
-      backup:
+      plugins:
+        - name: barman-cloud.cloudnative-pg.io
+          isWALArchiver: true
+          parameters:
+            barmanObjectName: grafana-backup-store
+  - apiVersion: barmancloud.cnpg.io/v1
+    kind: ObjectStore
+    metadata:
+      name: grafana-backup-store
+      namespace: monitoring
+    spec:
       retentionPolicy: "30d"
-        barmanObjectStore:
+      configuration:
         destinationPath: s3://postgresql-backups/grafana
         endpointURL: http://rook-ceph-rgw-ceph-objectstore.rook-ceph.svc:80
         s3Credentials:
@@ -195,10 +205,21 @@ grafana:
           compression: bzip2
         data:
           compression: bzip2
-        scheduledBackups:
-          - name: daily-backup
-            schedule: "0 2 * * *"  # 2 AM daily
+          immediateCheckpoint: true
+  - apiVersion: postgresql.cnpg.io/v1
+    kind: ScheduledBackup
+    metadata:
+      name: grafana-pg-backup
+      namespace: monitoring
+    spec:
+      method: plugin
+      immediate: true
+      schedule: "0 30 2 * * *"  # 2:30 AM daily
       backupOwnerReference: self
+      cluster:
+        name: grafana-pg-cluster
+      pluginConfiguration:
+        name: barman-cloud.cloudnative-pg.io
   - apiVersion: objectbucket.io/v1alpha1
     kind: ObjectBucketClaim
     metadata: