bugfix: wait for each cluster's cache to be ready before adding to clusters list

Author: christensenjairus

providers/kubeconfig/provider.go

@@ -237,6 +237,14 @@ func (p *Provider) handleSecret(ctx context.Context, secret *corev1.Secret, mgr
 		}
 	}()
 
+	// Wait for cache to be ready
+	log.Info("Waiting for cluster cache to be ready")
+	if !cl.GetCache().WaitForCacheSync(clusterCtx) {
+		cancel() // Cancel context before returning error
+		return fmt.Errorf("failed to wait for cache sync")
+	}
+	log.Info("Cluster cache is ready")
+
 	// Store the cluster
 	p.lock.Lock()
 	p.clusters[clusterName] = cl