feat: 添加子流程节点与重构工作流图构建

- 新增子流程节点(SubFlow)及SubFlowConfig配置结构
- 拆分BuildGraph与BuildGraphFromFlowContent，支持独立构建图与编译
- 移除ModelCallbackReq中多余字段，移除Intent节点注册
- 优化节点执行逻辑：调整OSS上传时机及变量引用
- 更新本地开发配置及依赖版本

workflow/service/flow/lambda_node.go

@@ -66,8 +66,8 @@ func SubFlowLambda(ctx context.Context, input any) (any, error) {
 		MaxConcurrency: subFlowConfig.MaxConcurrency,
 	})
 
-	skillName, from, userFrom := BuildParam(nodeExecInput)
+	//skillName, from, userFrom := BuildParam(nodeExecInput)
-	fmt.Printf("skillName: %s, from: %s, userFrom: %s\n", skillName, from, userFrom)
+	//fmt.Printf("skillName: %s, from: %s, userFrom: %s\n", skillName, from, userFrom)
 
 	// 6. 提取批量输入（从全局入参中获取）
 	batchInputs := make([]*flowDto.FlowExecutionInput, 0)