- Pickup the Scheduler process instead of launching a new one.
- submit a workgraph inside the scheduler
- Move report from Scheduler process to the workgraph process

The scheduler will listen to the task from scheduler_queue

1) can run multiple runner (daemon) for the scheduler, each runner will listen to the `scheduler_queue`, and the prefetch_count is set to 1, thus each runner can only launch one Scheduler process.
2) The scheduler process listen to the `workgraph_queue` to launch WorkGraph
3) the scheduler recieve rpc call to launch WorkGrpah
4) user can submit workgraph to the workgraph queue, or select the shceduler to run it by pk