fixing DQ issues

app/core/config.py

@@ -1,4 +1,12 @@
 # app/core/config.py
+"""Summary description ....
+
+This module provides classes and functions for:
+- ....
+- ....
+- ....
+"""
+
 from typing import List, Optional
 
 from pydantic_settings import \
@@ -6,6 +14,8 @@ from pydantic_settings import \
 
 
 class Settings(BaseSettings):
+    """Settings class inheriting from BaseSettings that allows values to be overridden by environment variables."""
+
     # Project information
     project_name: str = "Ecommerce Backend API with Marketplace Support"
     description: str = "Advanced product management system with JWT authentication"