Fix memory leak of volume and node cache

internal/controllers/sync-node/controller.go

@@ -175,6 +175,7 @@ func (r *Reconciler) sync(ctx context.Context) {
 			}
 		}
 		for nodeID, nodeKey := range orphanNodes {
+			delete(r.nodeHashes, nodeID)
 			delete(r.existingNodes, nodeID)
 			r.delete(ctx, nodeKey)
 		}

internal/controllers/sync-volume/controller.go

@@ -174,6 +174,7 @@ func (r *Reconciler) sync(ctx context.Context) {
 			}
 		}
 		for volID, volKey := range orphanVolumes {
+			delete(r.volumeHashes, volID)
 			delete(r.existingVolumes, volID)
 			r.delete(ctx, volKey)
 		}