fix: use correct namespace in k8s-deployment-control test

Namespace is now derived from stack name (laconic-test), not from
cluster-id (laconic-{cluster-id}). The kubectl pod query was using
the wrong namespace, returning empty results.

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

tests/k8s-deployment-control/run-test.sh

@@ -206,7 +206,8 @@ fi
 # The deployment's pod should be scheduled onto node: worker3
 # Check that's what happened
 # Get get the node onto which the stack pod has been deployed
-deployment_node=$(kubectl get pods -n laconic-${deployment_id} -l app=${deployment_id} -o=jsonpath='{.items..spec.nodeName}')
+# Namespace is now derived from stack name, not cluster-id
+deployment_node=$(kubectl get pods -n laconic-test -l app=${deployment_id} -o=jsonpath='{.items..spec.nodeName}')
 expected_node=${deployment_id}-worker3
 echo "Stack pod deployed to node: ${deployment_node}"
 if [[ ${deployment_node} == ${expected_node} ]]; then