fix(plugins): clean up unused imports in plugin_executing_state_steps.py

Remove unused imports (Any, given, PluginManager, PluginDescriptor) and
fix import ordering to satisfy ruff linting rules.

features/steps/plugin_executing_state_steps.py

@@ -9,22 +9,16 @@ Based on issue #5691.
 
 from __future__ import annotations
 
-from typing import Any
 from unittest.mock import patch
 
-from behave import given, then, when  # type: ignore[import-untyped]
+from behave import then, when  # type: ignore[import-untyped]
 from behave.runner import Context  # type: ignore[import-untyped]
 
 from cleveragents.infrastructure.plugins.exceptions import (
     PluginError,
     PluginNotFoundError,
 )
-from cleveragents.infrastructure.plugins.manager import PluginManager
-from cleveragents.infrastructure.plugins.types import (
-    PluginDescriptor,
-    PluginState,
-)
-
+from cleveragents.infrastructure.plugins.types import PluginState
 
 # ---------------------------------------------------------------------------
 # Execute plugin — happy path
@@ -64,7 +58,6 @@ def step_execution_result_empty_list(context: Context) -> None:
 def step_attempt_execute_failing(context: Context, name: str) -> None:
     """Execute a method that raises an exception on the plugin."""
     context.caught_exception = None
-    # Patch the instance's search method to raise a RuntimeError
     instance = context.manager.get_plugin_instance(name)
     if instance is not None:
         with patch.object(instance, "search", side_effect=RuntimeError("boom")):
@@ -79,7 +72,6 @@ def step_attempt_execute_failing(context: Context, name: str) -> None:
             except PluginError as exc:
                 context.caught_exception = exc
     else:
-        # Plugin not activated — try to execute anyway to get the error
         try:
             context.manager.execute_plugin(name, "search", "test", scope=frozenset())
         except PluginError as exc:
@@ -123,7 +115,6 @@ def step_attempt_execute_unknown(context: Context, name: str) -> None:
         context.caught_exception = exc
 
 
-
 # ---------------------------------------------------------------------------
 # Thread safety: EXECUTING state prevents deactivation
 # ---------------------------------------------------------------------------