fix(task): attribute async task usage log to the initiating node (#5684)

Async task usage logs (LogQuotaData node dimension) were recorded
under whichever node happened to poll the task to completion, not the
node that submitted it. For token/adaptor-billed video tasks the
pre-deduction is often 0, so the entire quota landed on the last
polling node.

Snapshot common.NodeName into TaskPrivateData at submit time and use
it when writing the settlement consume log; fall back to the current
node when empty so existing tasks stay compatible.

model/log.go

@@ -390,6 +390,7 @@ type RecordTaskBillingLogParams struct {
 	TokenId   int
 	Group     string
 	Other     map[string]interface{}
+	NodeName  string // 任务发起节点；为空时回退当前节点
 }
 
 func RecordTaskBillingLog(params RecordTaskBillingLogParams) {
@@ -423,6 +424,10 @@ func RecordTaskBillingLog(params RecordTaskBillingLogParams) {
 		common.SysLog("failed to record task billing log: " + err.Error())
 	}
 	if params.LogType == LogTypeConsume && common.DataExportEnabled {
+		nodeName := params.NodeName
+		if nodeName == "" {
+			nodeName = common.NodeName
+		}
 		gopool.Go(func() {
 			LogQuotaData(QuotaDataLogParams{
 				UserID:    params.UserId,
@@ -433,7 +438,7 @@ func RecordTaskBillingLog(params RecordTaskBillingLogParams) {
 				UseGroup:  params.Group,
 				TokenID:   params.TokenId,
 				ChannelID: params.ChannelId,
-				NodeName:  common.NodeName,
+				NodeName:  nodeName,
 			})
 		})
 	}

model/task.go

@@ -104,6 +104,7 @@ type TaskPrivateData struct {
 	BillingSource  string              `json:"billing_source,omitempty"`  // "wallet" 或 "subscription"
 	SubscriptionId int                 `json:"subscription_id,omitempty"` // 订阅 ID，用于订阅退款
 	TokenId        int                 `json:"token_id,omitempty"`        // 令牌 ID，用于令牌额度退款
+	NodeName       string              `json:"node_name,omitempty"`       // 发起任务的节点名，轮询结算阶段据此归属日志而非最后查询节点
 	BillingContext *TaskBillingContext `json:"billing_context,omitempty"` // 计费参数快照（用于轮询阶段重新计算）
 }