Auto cleanup not working

I've pushed all needed changes to the related fork, review needed.

Many thanks for that one, also found that something went wrong with database size, but didn't have time to figure out 😅
Checked, it works for me. Released!
Maybe some time soon will have time to add tests...

@zviryatko I am reopening this issue because I want you to commit the patch I am attaching in the next release if it's possible and you agree to changes I want to recommend.
The patch is related with auto cleanup changes I made - I think loading and deleting every single entity is pretty bad idea in context of performance. I think we should put entities ids into chunks and then load and delete them.