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_models.py

@@ -11,7 +11,6 @@ import os
 import datetime
 import time
 from src.common.logger import get_logger
-import threading
 from contextlib import contextmanager
 
 logger = get_logger("sqlalchemy_models")