es_objects plugin fixes

while writing documentation to the plugin: https://github.com/oxarbitrage/worker-proposals/blob/master/es_objects.md

i found 3 points that need attention and fixes:

- [x] Balance tracking, change to `account_balance`.
- [ ] Limit order tracking, when the limit order is created and filled in the same block the original limit order will not be saved. Generally, if an object is updated and then deleted in a block, data in ES is not updated (if we don't delete it).
- [ ] Feed tracking, several feeds coming in the same second.

ill take care of them.