refactor: Reorganize datamate-python (#34)

refactor: Reorganize datamate-python (previously label-studio-adapter) into a DDD style structure.

runtime/datamate-python/app/module/dataset/schema/dataset.py

@@ -0,0 +1,36 @@
+from pydantic import BaseModel, Field
+from typing import List, Optional, Dict, Any
+from datetime import datetime
+
+class DatasetTypeResponse(BaseModel):
+    """数据集类型响应模型"""
+    code: str = Field(..., description="类型编码")
+    name: str = Field(..., description="类型名称")
+    description: Optional[str] = Field(None, description="类型描述")
+    supportedFormats: List[str] = Field(default_factory=list, description="支持的文件格式")
+    icon: Optional[str] = Field(None, description="图标")
+
+class DatasetResponse(BaseModel):
+    """DM服务数据集响应模型"""
+    id: str = Field(..., description="数据集ID")
+    name: str = Field(..., description="数据集名称")
+    description: Optional[str] = Field(None, description="数据集描述")
+    datasetType: str = Field(..., description="数据集类型", alias="datasetType")
+    status: str = Field(..., description="数据集状态")
+    fileCount: int = Field(..., description="文件数量")
+    totalSize: int = Field(..., description="总大小（字节）")
+    createdAt: Optional[datetime] = Field(None, description="创建时间")
+    updatedAt: Optional[datetime] = Field(None, description="更新时间")
+    createdBy: Optional[str] = Field(None, description="创建者")
+    
+    # 为了向后兼容，添加一个属性方法返回类型对象
+    @property
+    def type(self) -> DatasetTypeResponse:
+        """兼容属性：返回类型对象"""
+        return DatasetTypeResponse(
+            code=self.datasetType,
+            name=self.datasetType,
+            description=None,
+            supportedFormats=[],
+            icon=None
+        )