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/report.py

@@ -0,0 +1,35 @@
+from enum import StrEnum
+from typing import TYPE_CHECKING
+
+from sqlmodel import Field, Relationship
+
+from .base import SQLModelBase
+from .mixin import TableBaseMixin
+
+if TYPE_CHECKING:
+    from .share import Share
+
+
+class ReportReason(StrEnum):
+    """举报原因枚举"""
+    # [TODO] 补充具体举报原因
+    pass
+
+
+class Report(SQLModelBase, TableBaseMixin):
+    """举报模型"""
+
+    reason: int = Field(default=0, sa_column_kwargs={"server_default": "0"})
+    """举报原因 [TODO] 待定义枚举"""
+    description: str | None = Field(default=None, max_length=255, description="补充描述")
+    
+    # 外键
+    share_id: int = Field(
+        foreign_key="share.id",
+        index=True,
+        ondelete="CASCADE"
+    )
+    """被举报的分享ID"""
+    
+    # 关系
+    share: "Share" = Relationship(back_populates="reports")