feat: 新增主动拉取与多类型回调功能

- 新增 ActivePull 实体、DAO、DTO 及 Service，支持主动拉取任务管理
- 新增 ComposeCallback、VideoCallback、HttpNodeCallback 多类型回调接口
- FlowExecution 增加 NodeGroupId 和 TotalTokens 字段，支持节点组追踪与 Token 统计
- ExecutedNodes 结构由字符串列表改为包含执行状态的节点对象列表
- 重构回调通知机制，统一 Notify 函数调用
- 优化输出项类型判断逻辑，新增文件类型标识

workflow/controller/flow/flow_execution_controller.go

@@ -16,11 +16,21 @@ func (c *flowExecution) Execute(ctx context.Context, req *flowDto.ExecuteReq) (r
 	return flowService.FlowExecutionService.Execute(ctx, req)
 }
 
+func (c *flowExecution) ComposeCallBack(ctx context.Context, req *flowDto.ComposeCallbackReq) (res *beans.ResponseEmpty, err error) {
+	err = flowService.FlowExecutionService.ComposeCallback(ctx, req)
+	return
+}
+
 func (c *flowExecution) ModelCallback(ctx context.Context, req *flowDto.ModelCallbackReq) (res *beans.ResponseEmpty, err error) {
 	err = flowService.FlowExecutionService.ModelCallback(ctx, req)
 	return
 }
 
+func (c *flowExecution) VideoCallback(ctx context.Context, req *flowDto.VideoCallbackReq) (res *beans.ResponseEmpty, err error) {
+	err = flowService.FlowExecutionService.VideoCallback(ctx, req)
+	return
+}
+
 func (c *flowExecution) Get(ctx context.Context, req *flowDto.GetFlowExecutionReq) (res *flowDto.VOFlowExecution, err error) {
 	return flowService.FlowExecutionService.Get(ctx, req)
 }