feat(data-management): 添加数据集文件取消上传功能

- 在OpenAPI规范中定义了取消上传的REST端点接口
- 实现了DatasetFileApplicationService中的取消上传业务逻辑
- 在FileService中添加了完整的取消上传服务方法
- 创建了DatasetUploadController控制器处理取消上传请求
- 实现了临时分片文件清理和数据库记录删除功能

backend/openapi/specs/data-management.yaml

@@ -447,12 +447,12 @@ paths:
               schema:
                 type: string
 
-  /data-management/datasets/{datasetId}/files/upload/chunk:
-    post:
-      tags: [ DatasetFile ]
-      operationId: chunkUpload
-      summary: 切片上传
-      description: 使用预上传返回的请求ID进行分片上传
+  /data-management/datasets/{datasetId}/files/upload/chunk:
+    post:
+      tags: [ DatasetFile ]
+      operationId: chunkUpload
+      summary: 切片上传
+      description: 使用预上传返回的请求ID进行分片上传
       parameters:
         - name: datasetId
           in: path
@@ -466,15 +466,32 @@ paths:
           multipart/form-data:
             schema:
               $ref: '#/components/schemas/UploadFileRequest'
-      responses:
-        '200':
-          description: 上传成功
-
-  /data-management/dataset-types:
-    get:
-      operationId: getDatasetTypes
-      tags: [DatasetType]
-      summary: 获取数据集类型列表
+      responses:
+        '200':
+          description: 上传成功
+
+  /data-management/datasets/upload/cancel-upload/{reqId}:
+    put:
+      tags: [ DatasetFile ]
+      operationId: cancelUpload
+      summary: 取消上传
+      description: 取消预上传请求并清理临时分片
+      parameters:
+        - name: reqId
+          in: path
+          required: true
+          schema:
+            type: string
+          description: 预上传请求ID
+      responses:
+        '200':
+          description: 取消成功
+
+  /data-management/dataset-types:
+    get:
+      operationId: getDatasetTypes
+      tags: [DatasetType]
+      summary: 获取数据集类型列表
       description: 获取所有支持的数据集类型
       responses:
         '200':