【add】Create user alias table and functionality

api/app/schemas/user_alias_schema.py

@@ -0,0 +1,33 @@
+import uuid
+import datetime
+from typing import Optional, Dict, Any
+from pydantic import BaseModel, Field
+from pydantic import ConfigDict
+
+
+class UserAliasBase(BaseModel):
+    """用户别名基础模型"""
+    other_name: str = Field(description="关联的用户名称")
+    alias: Optional[str] = Field(description="用户别名", default=None)
+    meta_data: Optional[Dict[str, Any]] = Field(description="用户相关的扩展信息", default=None)
+
+
+class UserAliasCreate(UserAliasBase):
+    """创建用户别名请求模型"""
+    end_user_id: uuid.UUID = Field(description="关联的终端用户ID")
+
+
+class UserAliasUpdate(BaseModel):
+    """更新用户别名请求模型"""
+    alias: Optional[str] = Field(description="用户别名", default=None)
+    meta_data: Optional[Dict[str, Any]] = Field(description="用户相关的扩展信息", default=None)
+
+
+class UserAliasResponse(UserAliasBase):
+    """用户别名响应模型"""
+    model_config = ConfigDict(from_attributes=True)
+    
+    id: uuid.UUID = Field(description="别名ID")
+    end_user_id: uuid.UUID = Field(description="关联的终端用户ID")
+    created_at: datetime.datetime = Field(description="创建时间")
+    updated_at: datetime.datetime = Field(description="更新时间")