refactor: imports and reorganize domain structure

- Updated import statements across multiple modules to use relative imports for better encapsulation.
- Consolidated and organized the `__init__.py` files in various domain packages to expose necessary classes and functions.
- Improved code readability and maintainability by grouping related imports and removing unused ones.
- Ensured consistent import patterns across the domain, enhancing the overall structure of the codebase.

domain/backup/service.py

@@ -4,8 +4,8 @@ from datetime import datetime
 from fastapi import HTTPException
 from tortoise.transactions import in_transaction
 
-from domain.backup.types import BackupData
-from domain.config.service import VERSION
+from domain.config import VERSION
+from .types import BackupData
 from models.database import (
     AIDefaultModel,
     AIModel,