fix: 修复自定义指标创建时间异常存储错误

features/pm/performance.go

@@ -292,6 +292,7 @@ func PostKPIReportFromNF(w http.ResponseWriter, r *http.Request) {
 		Index:       int16(kpiData.Index),
 		Granularity: &kpiData.Granularity,
 		TenantID:    &kpiData.TenantID,
+		CreatedAt:   kpiData.CreatedAt,
 	}
 
 	// 发送到匹配的网元