debug: add kubeconfig diagnostics to CI

.gitea/workflows/deploy.yaml

@@ -82,10 +82,11 @@ jobs:
       - name: Set kubeconfig
         run: |
           mkdir -p $HOME/.kube
-          echo '${{ secrets.VOLCANO_INTERNAL_KUBE_CONFIG }}' | base64 -d > $HOME/.kube/config
+          printf '%s\n' '${{ secrets.VOLCANO_INTERNAL_KUBE_CONFIG }}' > $HOME/.kube/config
           chmod 600 $HOME/.kube/config
-          echo "kubeconfig server:"
-          grep server $HOME/.kube/config
+          echo "kubeconfig lines: $(wc -l < $HOME/.kube/config)"
+          grep server $HOME/.kube/config || echo "WARNING: no server found in kubeconfig"
+          kubectl cluster-info 2>&1 | head -3 || true
 
       - name: Deploy to K3s
         id: deploy