Need to do load testing again

[ctm]

Use websocket_tool to make sure we can still spin up 10,000 observers in a short time.

I didn't think about it at the time, but when we added forensic info log lines, we may have interfered with the ability to spin up observers at the rate we used to. I don't think that's the case, but it makes sense to double-check.

I'm labeling this as high priority, but there's no need to do it anytime soon (i.e., before Bigfoot 200), since there's nothing that will cause a great interest in craftpoker.com in the near future.