also fixed the save time loop and spaced it out
to 10k events instead of 100.
Notably, the event no. of rows caps out at around 5 by default
because of default -binlog-row-event-max-size=8192 in mysql; that's
how many (torrent) rows fit into a single event.
We could increase that, but instead I think it's finally time to finally
multithread this thing; both the binlog read and the ES POST shouldn't
use the GIL so it'll actually work.
mainly helps with the stat updates, that come in
a single INSERT VALUES (...) ON CONFLICT UPDATE event,
which helpfully translates to a bulk index event.
It seems like elasticsearch should still be buffering that up
internally, so maybe the refresh_interval: 30s change will help
more than this.
