fix 任务获取userid处理

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

@@ -250,7 +250,9 @@ public class AssignmentService : IAssignmentService
                 .OrderBy(deviceTask => new { Priority = SqlFunc.Desc(deviceTask.Priority), deviceTask.CreateTime })
                 .Select((deviceTask, device, deviceTemplate, ga, gaLeave, department, gainfoEx) => new TaskDto
                 {
-                    UserId = SqlFunc.IsNull(SqlFunc.IsNull(deviceTask.UserId, ga.Id), gaLeave.IdentityUserId),
+                    UserId = deviceTask.UserId == 0 || deviceTask.UserId == null
+                        ? gaLeave.IdentityUserId
+                        : deviceTask.UserId,
                     TaskId = deviceTask.Id,
                     Type = deviceTask.Type,
                     DeviceUniqueNo = deviceTask.DeviceUniqueNo,