style: wrap long line in cluster_info.py to fix flake8 E501

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

stack_orchestrator/deploy/k8s/cluster_info.py

@@ -712,7 +712,10 @@ class ClusterInfo:
 
             # Use a distinct app label for job pods so they don't get
             # picked up by pods_in_deployment() which queries app={app_name}.
-            pod_labels = {"app": f"{self.app_name}-job", **({"app.kubernetes.io/stack": self.stack_name} if self.stack_name else {})}
+            pod_labels = {
+                "app": f"{self.app_name}-job",
+                **({"app.kubernetes.io/stack": self.stack_name} if self.stack_name else {}),
+            }
             template = client.V1PodTemplateSpec(
                 metadata=client.V1ObjectMeta(
                     labels=pod_labels