chore: resolve linting errors in test modules

tests/conftest.py

@@ -1,10 +1,13 @@
 """Pytest configuration and shared fixtures for Strix tests."""
 
+from collections.abc import Callable
+from typing import Any
+
 import pytest
 
 
 @pytest.fixture
-def sample_function_with_types():
+def sample_function_with_types() -> Callable[..., None]:
     """Create a sample function with type annotations for testing argument conversion."""
 
     def func(
@@ -12,8 +15,8 @@ def sample_function_with_types():
         count: int,
         enabled: bool,
         ratio: float,
-        items: list,
-        config: dict,
+        items: list[Any],
+        config: dict[str, Any],
         optional: str | None = None,
     ) -> None:
         pass
@@ -22,10 +25,10 @@ def sample_function_with_types():
 
 
 @pytest.fixture
-def sample_function_no_annotations():
+def sample_function_no_annotations() -> Callable[..., None]:
     """Create a sample function without type annotations."""
 
-    def func(arg1, arg2, arg3):
+    def func(arg1: Any, arg2: Any, arg3: Any) -> None:
         pass
 
     return func