Rerun of Pairings

I've been trying to think of a good way to do that, but the 'recommended way' using Task Queues (which I can then limit to 3-4 queries a second instead of the 5-6 I was getting yesterday) will break any reasonable way of having priority battles.

Also, there is no way to programatically retrieve the current quota usage stats, which means I can't do any auto-throttling.

I can tune it not to do database writes unless a bot has x or more pending battles, which is how I did it previously when on free tier, but the majority of the time is actually taken up with (de)serialising the pairings data, which is why I was trying to shoehorn in marshal. I'll add a min pending battles limit, and you can turn those clients back on, we'll see what happens. Of course, it will probably only hit quota tomorrow night if it's an issue, since today has been pretty slow.