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/adapters/service.py

@@ -2,13 +2,13 @@ from typing import Optional
 
 from fastapi import HTTPException
 
-from domain.adapters.registry import (
+from domain.auth import User
+from .registry import (
     get_config_schemas,
     normalize_adapter_type,
     runtime_registry,
 )
-from domain.adapters.types import AdapterCreate, AdapterOut
-from domain.auth.types import User
+from .types import AdapterCreate, AdapterOut
 from models import StorageAdapter