feat: add models for physical files, policies, and user management

- Implement PhysicalFile model to manage physical file references and reference counting.
- Create Policy model with associated options and group links for storage policies.
- Introduce Redeem and Report models for handling redeem codes and reports.
- Add Settings model for site configuration and user settings management.
- Develop Share model for sharing objects with unique codes and associated metadata.
- Implement SourceLink model for managing download links associated with objects.
- Create StoragePack model for managing user storage packages.
- Add Tag model for user-defined tags with manual and automatic types.
- Implement Task model for managing background tasks with status tracking.
- Develop User model with comprehensive user management features including authentication.
- Introduce UserAuthn model for managing WebAuthn credentials.
- Create WebDAV model for managing WebDAV accounts associated with users.

tests/unit/models/test_setting.py

@@ -5,7 +5,7 @@ import pytest
 from sqlalchemy.exc import IntegrityError
 from sqlmodel.ext.asyncio.session import AsyncSession
 
-from models.setting import Setting, SettingsType
+from sqlmodels.setting import Setting, SettingsType
 
 
 @pytest.mark.asyncio
@@ -113,7 +113,7 @@ async def test_setting_update_value(db_session: AsyncSession):
     setting = await setting.save(db_session)
 
     # 更新值
-    from models.base import SQLModelBase
+    from sqlmodels.base import SQLModelBase
 
     class SettingUpdate(SQLModelBase):
         value: str | None = None