1.router has been changed to redis
2.Support node with redis online heartbeat maintenance
3.Support for gRPC and Discovery services
4.Support node connection number and weight scheduling
5.Support node scheduling by region
6.Support instruction subscription
7.Support the current connection room switch
8.Support multiple room types ({type}://{room_id})
9.Support sending messages by device_id
10.Support for room message aggregation
11.Supports IPv6