chore: perform widespread code cleanup and formatting

Perform a comprehensive code cleanup across multiple modules to improve code quality, consistency, and maintainability.

Key changes include:
- Removing numerous unused imports.
- Standardizing import order.
- Eliminating trailing whitespace and inconsistent newlines.
- Updating legacy type hints to modern syntax (e.g., `List` -> `list`).
- Making minor improvements for code robustness and style.

src/chat/message_receive/storage.py

@@ -12,7 +12,6 @@ from src.common.data_models.database_data_model import DatabaseMessages
 from src.common.database.core import get_db_session
 from src.common.database.core.models import Images, Messages
 from src.common.logger import get_logger
-from src.config.config import global_config
 
 from .chat_stream import ChatStream
 from .message import MessageSending