Idea: UI to show query nodes

[mochet]

Query Nodes are essential to the platform, it would be good to have a way to see how each QN is running (such as information concerning the latest block it has processed)

I'm not sure of the best method to check this, I have created an issue here to explore it: Joystream/joystream#3271

[traumschule]

https://joystreamstats.live/storage

can become more sophisticated by comparing returned data and detecting setup issues (#3271) incomplete syncs or even chain splits later. related: #641

[mochet]

It is possible to get the status of a query node by running the following

subscription
	{stateSubscription
    	{lastCompleteBlock,lastProcessedEvent,indexerHead,chainHead}
  }

This only works on the official Joystream QN (https://query.joystream.org/graphql) but no others, so maybe has to be activated.
But it seems like a viable way to keep track of which Query Nodes are working and which aren't.