feat: 重构节点上下文与并发执行逻辑

重构GetNodeContextContent返回类型为切片，修复并发竞态与协程泄漏问题；回调改用OSS文件获取结果；调整节点输入上传时序

workflow/service/flow/flow_execution_service.go

@@ -664,18 +664,9 @@ func registerNodeToGraph(graph *compose.Graph[any, any], flowNode entity.FlowNod
 			// 执行节点
 			_, err = lambda(ctx, realInput)
 			durationMs := time.Since(startTime).Milliseconds()
-			// 上传OSS（每条独立上传）
-			ossResult1, err := Upload(ctx, &dto.UploadFileBytesReq{
-				FileBytes: gconv.Bytes(gconv.String(realInput)),
-				FileName:  fmt.Sprintf("nodeInput:%v.txt", time.Now().UnixMilli()),
-			})
-			if err != nil {
-				return nil, err
-			}
 			updateReq := &nodeDto.UpdateNodeExecutionReq{
-				Id:               nodeExecutionId,
-				OutputParamsPath: ossResult1.FileURL,
-				DurationMs:       durationMs,
+				Id:         nodeExecutionId,
+				DurationMs: durationMs,
 			}
 			if err != nil {
 				// 执行失败，更新状态
@@ -689,7 +680,15 @@ func registerNodeToGraph(graph *compose.Graph[any, any], flowNode entity.FlowNod
 				})
 				return nil, err
 			}
-
+			// 上传OSS（每条独立上传）
+			ossResult1, err := Upload(ctx, &dto.UploadFileBytesReq{
+				FileBytes: gconv.Bytes(gconv.String(realInput)),
+				FileName:  fmt.Sprintf("nodeInput:%v.txt", time.Now().UnixMilli()),
+			})
+			if err != nil {
+				return nil, err
+			}
+			updateReq.OutputParamsPath = ossResult1.FileURL
 			// 执行成功，更新状态
 			updateReq.Status = node.NodeExecutionStatusSuccess.Code()
 			_, _ = nodeDao.NodeExecutionDao.Update(ctx, updateReq)