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/services/data-management-service/src/main/java/com/datamate/datamanagement/application/DatasetFileApplicationService.java

@@ -499,11 +499,19 @@ public class DatasetFileApplicationService {
      *
      * @param uploadFileRequest 上传请求
      */
-    @Transactional
-    public void chunkUpload(String datasetId, UploadFileRequest uploadFileRequest) {
-        FileUploadResult uploadResult = fileService.chunkUpload(DatasetConverter.INSTANCE.toChunkUploadRequest(uploadFileRequest));
-        saveFileInfoToDb(uploadResult, datasetId);
-    }
+    @Transactional
+    public void chunkUpload(String datasetId, UploadFileRequest uploadFileRequest) {
+        FileUploadResult uploadResult = fileService.chunkUpload(DatasetConverter.INSTANCE.toChunkUploadRequest(uploadFileRequest));
+        saveFileInfoToDb(uploadResult, datasetId);
+    }
+
+    /**
+     * 取消上传
+     */
+    @Transactional
+    public void cancelUpload(String reqId) {
+        fileService.cancelUpload(reqId);
+    }
 
     private void saveFileInfoToDb(FileUploadResult fileUploadResult, String datasetId) {
         if (Objects.isNull(fileUploadResult.getSavedFile())) {

backend/services/data-management-service/src/main/java/com/datamate/datamanagement/interfaces/rest/DatasetUploadController.java

@@ -0,0 +1,33 @@
+package com.datamate.datamanagement.interfaces.rest;
+
+import com.datamate.datamanagement.application.DatasetFileApplicationService;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PutMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+/**
+ * 数据集上传控制器
+ */
+@Slf4j
+@RestController
+@RequiredArgsConstructor
+@RequestMapping("/data-management/datasets/upload")
+public class DatasetUploadController {
+
+    private final DatasetFileApplicationService datasetFileApplicationService;
+
+    /**
+     * 取消上传
+     *
+     * @param reqId 预上传请求ID
+     */
+    @PutMapping("/cancel-upload/{reqId}")
+    public ResponseEntity<Void> cancelUpload(@PathVariable("reqId") String reqId) {
+        datasetFileApplicationService.cancelUpload(reqId);
+        return ResponseEntity.ok().build();
+    }
+}