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/node/node_library_service.go

@@ -93,36 +93,23 @@ func (s *nodeLibraryService) GetNodeLibrary(ctx context.Context, req *nodeDto.Wo
 					FormConfig:   []node.NodeFormField{},
 					ModelConfig:  []node.ModelItem{},
 				},
-				//{
-				//	NodeCode:    node.NodeTypeSenseOptimizeModel,
-				//	NodeName:    node.NodeNameSenseOptimizeModel,
-				//	ModelType:   node.ModelTypeText,
-				//	SkillOption: false,
-				//	FormConfig:  []node.NodeFormField{},
-				//	ModelConfig: []node.ModelItem{},
-				//},
-				//{
-				//	NodeCode:    node.NodeTypeStoryOptimizeModel,
-				//	NodeName:    node.NodeNameStoryOptimizeModel,
-				//	ModelType:   node.ModelTypeText,
-				//	SkillOption: false,
-				//	FormConfig:  []node.NodeFormField{},
-				//	ModelConfig: []node.ModelItem{},
-				//},
-				//{
-				//	NodeCode:    node.NodeTypeScriptOptimizeModel,
-				//	NodeName:    node.NodeNameScriptOptimizeModel,
-				//	ModelType:   node.ModelTypeText,
-				//	SkillOption: false,
-				//	FormConfig:  []node.NodeFormField{},
-				//	ModelConfig: []node.ModelItem{},
-				//},
 			},
 		},
 		{
 			Group: node.NodeGroupBase,
 			Label: node.NodeGroupNameBase,
 			Items: []node.NodeItem{
+				{
+					NodeCode:     node.NodeTypeSubFlow,
+					NodeName:     node.NodeSubFlow,
+					SkillOption:  false,
+					PromptOption: false,
+					IsSaveFile:   false,
+					FormConfig: []node.NodeFormField{
+						{Field: "maxConcurrency", Label: "最大并发数", Type: "input", Required: true},
+					},
+					ModelConfig: []node.ModelItem{},
+				},
 				{
 					NodeCode:     node.NodeTypeDataConversionModel,
 					NodeName:     node.NodeNameDataConversionModel,