fix(k8s): skip Deployment creation for jobs-only stacks

When a stack defines only jobs: (no pods:), the parsed_pod_yaml_map
is empty. Creating a Deployment with no containers causes a 422 error
from the k8s API. Skip Deployment creation when there are no pods.

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

stack_orchestrator/deploy/k8s/deploy_k8s.py

@@ -263,6 +263,11 @@ class K8sDeployer(Deployer):
                     print(f"{cfg_rsp}")
 
     def _create_deployment(self):
+        # Skip if there are no pods to deploy (e.g. jobs-only stacks)
+        if not self.cluster_info.parsed_pod_yaml_map:
+            if opts.o.debug:
+                print("No pods defined, skipping Deployment creation")
+            return
         # Process compose files into a Deployment
         deployment = self.cluster_info.get_deployment(
             image_pull_policy=None if self.is_kind() else "Always"