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.

sqlmodels/order.py

@@ -0,0 +1,66 @@
+from enum import StrEnum
+from typing import TYPE_CHECKING
+from uuid import UUID
+
+from sqlmodel import Field, Relationship
+
+from .base import SQLModelBase
+from .mixin import TableBaseMixin
+
+if TYPE_CHECKING:
+    from .user import User
+
+
+class OrderStatus(StrEnum):
+    """订单状态枚举"""
+    PENDING = "pending"
+    """待支付"""
+    COMPLETED = "completed"
+    """已完成"""
+    CANCELLED = "cancelled"
+    """已取消"""
+
+
+class OrderType(StrEnum):
+    """订单类型枚举"""
+    # [TODO] 补充具体订单类型
+    pass
+
+
+class Order(SQLModelBase, TableBaseMixin):
+    """订单模型"""
+
+    order_no: str = Field(max_length=255, unique=True, index=True)
+    """订单号，唯一"""
+
+    type: int = Field(default=0, sa_column_kwargs={"server_default": "0"})
+    """订单类型 [TODO] 待定义枚举"""
+
+    method: str | None = Field(default=None, max_length=255)
+    """支付方式"""
+
+    product_id: int | None = Field(default=None)
+    """商品ID"""
+
+    num: int = Field(default=1, sa_column_kwargs={"server_default": "1"})
+    """购买数量"""
+
+    name: str = Field(max_length=255)
+    """商品名称"""
+
+    price: int = Field(default=0, sa_column_kwargs={"server_default": "0"})
+    """订单价格（分）"""
+
+    status: OrderStatus = Field(default=OrderStatus.PENDING)
+    """订单状态"""
+    
+    # 外键
+    user_id: UUID = Field(
+        foreign_key="user.id",
+        index=True,
+        ondelete="CASCADE"
+    )
+    """所属用户UUID"""
+    
+    # 关系
+    user: "User" = Relationship(back_populates="orders")