Fix lint and deploy test failures

- Rename ambiguous variable 'l' to 'item' in cluster_info.py (flake8 E741)
- Use underscore in test config variable name (Docker Compose rejects
  hyphens in env var names)

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

stack_orchestrator/data/stacks/test/deploy/commands.py

@@ -21,7 +21,7 @@ from stack_orchestrator.deploy.deploy_util import VolumeMapping, run_container_c
 from pathlib import Path
 
 default_spec_file_content = """config:
-    test-variable-1: test-value-1
+    test_variable_1: test-value-1
 """
 
 

stack_orchestrator/deploy/k8s/cluster_info.py

@@ -592,7 +592,7 @@ class ClusterInfo:
                 if isinstance(svc_labels, list):
                     # docker-compose labels can be a list of "key=value"
                     svc_labels = dict(
-                        l.split("=", 1) for l in svc_labels
+                        item.split("=", 1) for item in svc_labels
                     )
                 is_init = str(
                     svc_labels.get("laconic.init-container", "")