Garbage Collection (with Badger) Happening?

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We noticed great performance with badger, but lots of runaway disk space usage. It seems badger requires garbage collection to happen separately and manually.

Is there any plan to do garbage collection? To make a PR perhaps you could point us in the right direction?

The garbage collection seems like critical piece of using badger with high cardinality key spaces.

We checked to see if there is a command line tool for badger GC, but there is not apparently, so it seems that it really needs to be built into souin or another separate tool.