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/model/entity/flow_execution.go

@@ -11,6 +11,7 @@ type FlowExecution struct {
 	// 业务字段
 	FlowUserId      int64                         `orm:"flow_user_id" json:"flowUserId" description:"流程ID"`
 	FlowName        string                        `orm:"flow_name" json:"flowName" description:"流程名称"`
+	NodeGroupId     string                        `orm:"node_group_id" json:"nodeGroupId" description:"节点组ID"`
 	TriggerType     flow.FlowExecutionTriggerType `orm:"trigger_type" json:"triggerType" description:"触发类型"`
 	DurationMs      int64                         `orm:"duration_ms" json:"durationMs" description:"执行时长（毫秒）"`
 	Status          flow.FlowExecutionStatus      `orm:"status" json:"status" description:"状态:1-运行中,2-成功,3-失败"`
@@ -20,12 +21,14 @@ type FlowExecution struct {
 	ErrorMessage    string                        `orm:"error_message" json:"errorMessage" description:"错误信息"`
 	TraceId         string                        `orm:"trace_id" json:"traceId" description:"跟踪ID"`
 	SessionId       string                        `orm:"session_id" json:"sessionId" description:"会话ID"`
+	TotalTokens     int                           `orm:"total_tokens" json:"totalTokens" description:"总token消耗"`
 }
 
 type flowExecutionCol struct {
 	beans.SQLBaseCol
 	FlowUserId      string
 	FlowName        string
+	NodeGroupId     string
 	TriggerType     string
 	DurationMs      string
 	Status          string
@@ -35,12 +38,14 @@ type flowExecutionCol struct {
 	ErrorMessage    string
 	TraceId         string
 	SessionId       string
+	TotalTokens     string
 }
 
 var FlowExecutionCol = flowExecutionCol{
 	SQLBaseCol:      beans.DefSQLBaseCol,
 	FlowUserId:      "flow_user_id",
 	FlowName:        "flow_name",
+	NodeGroupId:     "node_group_id",
 	TriggerType:     "trigger_type",
 	DurationMs:      "duration_ms",
 	Status:          "status",
@@ -50,4 +55,5 @@ var FlowExecutionCol = flowExecutionCol{
 	ErrorMessage:    "error_message",
 	TraceId:         "trace_id",
 	SessionId:       "session_id",
+	TotalTokens:     "total_tokens",
 }