fix 代码优化

Src/Dlhis.ScheduledTask/TaskAssignment/Services/Implements/DeviceTaskAssignmentService.cs

@@ -38,6 +38,7 @@ public class DeviceTaskAssignmentService : IDeviceTaskAssignmentService
                 UserName = ga.Name,
                 UserCode = ga.Code,
                 Type = deviceTask.Type,
+                CreateTime = deviceTask.CreateTime,
                 LastUpdateTime = deviceTask.ModifiedTime
             })
             .ToPageListAsync(request);