Remove unused imports across multiple modules

Cleaned up various files by removing unused or redundant import statements to improve code readability and reduce potential confusion. No functional changes were made.

src/common/database/sqlalchemy_database_api.py

@@ -7,9 +7,7 @@
 import traceback
 import time
 from typing import Dict, List, Any, Union, Type, Optional
-from contextlib import contextmanager
-from sqlalchemy.orm import Session
-from sqlalchemy.exc import SQLAlchemyError, DisconnectionError, OperationalError
+from sqlalchemy.exc import SQLAlchemyError
 from sqlalchemy import desc, asc, func, and_
 from src.common.logger import get_logger
 from src.common.database.sqlalchemy_models import (