Ivan 'provod' Avdeev 45a141aa36 vk: studio: clear submodule cache at appropriate times
Add render refcount to submodels to diagnose when it can't properly clear things due to them being used somewhere still.

Also add `speeds.submodels_cache_{dynamic,static}` counters to show how many submodels render models have been allocated.
2023-08-28 09:11:48 -07:00
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