fix(acms): move ContextAssemblyPipeline import to top of step file

- Move ContextAssemblyPipeline import to top of execution_phase_context_assembler_coverage_steps.py
- Remove duplicate in-function import from step_epcov_pipeline_is_context_assembly
- Remove duplicate CHANGELOG entry for ACMS Default Pipeline Wiring (#9169)
- Lint and typecheck pass; CI failures are pre-existing in other test files

CHANGELOG.md

@@ -14,14 +14,6 @@ The format follows [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
   and `ParallelStrategyExecutor`. The DI container's `acms_pipeline` singleton and
   `plan.py`'s `_get_plan_executor()` are updated accordingly. BDD coverage added to
   verify `ContextAssemblyPipeline` is the default.
-
-
-- **ACMS Default Pipeline Wiring** (#9169): `ACMSExecutePhaseContextAssembler` now
-  defaults to `ContextAssemblyPipeline()` instead of the base `ACMSPipeline()` when
-  no pipeline is injected. This ensures plan execution context assembly uses the full
-  production pipeline with `ConfidenceWeightedSelector`, `ProportionalBudgetAllocator`,
-  and `ParallelStrategyExecutor`. The DI container's `acms_pipeline` singleton and
-  `plan.py`'s `_get_plan_executor()` are updated accordingly. BDD coverage added to
   verify `ContextAssemblyPipeline` is the default.
 
 

features/steps/execute_phase_context_assembler_coverage_steps.py

@@ -18,6 +18,7 @@ from unittest.mock import MagicMock, patch
 from behave import given, then, when
 from behave.runner import Context
 
+from cleveragents.application.services.acms_pipeline import ContextAssemblyPipeline
 from cleveragents.application.services.execute_phase_context_assembler import (
     ACMSExecutePhaseContextAssembler,
 )
@@ -958,7 +959,6 @@ def step_epcov_assembler_no_pipeline(context: Context) -> None:
 
 @then("epcov the assembler pipeline should be a ContextAssemblyPipeline instance")
 def step_epcov_pipeline_is_context_assembly(context: Context) -> None:
-    from cleveragents.application.services.acms_pipeline import ContextAssemblyPipeline
 
     assert isinstance(context.epcov_assembler._pipeline, ContextAssemblyPipeline), (
         f"Expected ContextAssemblyPipeline, got {type(context.epcov_assembler._pipeline)}"