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.

main.py

@@ -1,25 +1,29 @@
 from typing import NoReturn
 
 from fastapi import FastAPI, Request
-from fastapi.middleware.cors import CORSMiddleware
 
 from utils.conf import appmeta
 from utils.http.http_exceptions import raise_internal_error
 from utils.lifespan import lifespan
-from models.database import init_db
-from models.migration import migration
+from sqlmodels.database_connection import DatabaseManager
+from sqlmodels.migration import migration
 from utils import JWT
 from routers import router
 from service.redis import RedisManager
 from loguru import logger as l
 
+async def _init_db() -> None:
+    """初始化数据库连接引擎"""
+    await DatabaseManager.init(appmeta.database_url, debug=appmeta.debug)
+
 # 添加初始化数据库启动项
-lifespan.add_startup(init_db)
+lifespan.add_startup(_init_db)
 lifespan.add_startup(migration)
 lifespan.add_startup(JWT.load_secret_key)
 lifespan.add_startup(RedisManager.connect)
 
 # 添加关闭项
+lifespan.add_shutdown(DatabaseManager.close)
 lifespan.add_shutdown(RedisManager.disconnect)
 
 # 创建应用实例并设置元数据