Reuse worker to scheduler WS connection for scheduling

I learned that right now for every task the scheduler creates a new connection that sometimes may not be feasible when the worker is behind the firewall. Since WS communication between client -> scheduler and worker -> scheduler already works, it can be used for scheduling tasks. Although, I understand that there may be some worker to worker communication, it's important to make the system work even though a worker is not directly accessible from the scheduler.