fix: resolve CI/CD test failures and linting issues

config_convert/utils/type_inference.py

@@ -1,7 +1,7 @@
 """Smart type inference utilities for converting string values to Python types."""
 
 import re
-from typing import Any, Optional, Union
+from typing import Any
 
 
 BOOLEAN_TRUE_VALUES = {"true", "yes", "on", "1"}