Previously, if downloading the ensemble took a long time then tons of
agents could all decide they want to run an ensemble before any of them
increment started. This is due to the delay there was between deciding
to run the ensemble and incrementing started. Reduce this delay by
incrementing started right after picking the ensemble, and continually
heartbeat until either the ensemble is stopped or we increment ended
Previously, if downloading the ensemble took a long time then tons of agents could all decide they want to run an ensemble before any of them increment
started. This is due to the delay there was between deciding to run the ensemble and incrementingstarted. Reduce this delay by incrementingstartedright after picking the ensemble, and continually heartbeat until either the ensemble is stopped or we incrementended