fix(tests): remove AutomationLevel references after legacy field removal

Master's refactor(automation) commit removed the AutomationLevel enum
and automation_level field from Plan. Update all behave steps, robot
helpers, and feature scenarios that referenced the removed type:

- cli_lifecycle_robot_alignment_steps.py: drop import and field assignment
- persistence_robot_alignment_steps.py: drop import and field assignment
- subplan_model_steps.py: drop import, parameter, and field assignment
- subplan_model.feature: replace automation level scenario with profile check
- helper_cli_lifecycle.py: drop import and field assignment
- helper_persistence_lifecycle.py: drop import, field assignment, and assertion

robot/helper_cli_lifecycle.py

@@ -32,7 +32,6 @@ from cleveragents.domain.models.core.change import (  # noqa: E402
     SpecChangeSet,
 )
 from cleveragents.domain.models.core.plan import (  # noqa: E402
-    AutomationLevel,
     AutomationProfileProvenance,
     AutomationProfileRef,
     NamespacedName,
@@ -89,7 +88,6 @@ def _mock_plan(
         action_name="local/lifecycle-action",
         phase=phase,
         processing_state=state,
-        automation_level=AutomationLevel.MANUAL,
         project_links=[ProjectLink(project_name="proj-a")],
         arguments={"target_coverage": 80},
         arguments_order=["target_coverage"],