Have a way to test throughput of snowflake proxy
A common question from snowflake proxy volunteers is whether or not their proxy is working (see comment 11 on legacy/trac#31109 (moved)). It would be great to have some kind of bandwidth test for proxy owners to see whether or not their proxy is reachable from a remote probe point. This might also help us find and diagnose problems with existing proxies.
we can't ask the broker to assign us a specific proxy at the moment so this test would likely be separate from the broker (unless we add an entirely new feature which I'm hesitant to do)
we'll have to protect this service from abuse somehow, probably by rate-limiting. See some discussion on legacy/trac#31874 (moved). It would be best to engineer a way so that only a proxy owner can run the test on their proxy.