Verify local blob store is being used

[mcookhome]

Hi there, I'm wondering if there's any way that I can see that my workers are retrieving data from the hollow files installed at the path specified in the local blob store.

Right now, I think the workers should be using files I have previously installed on the container that hollow is being run on, but it seems like that's not the case. I was hoping someone could help me figure out how to prove that I'm correct and that the hollow files are not being read from the local store without forking the project and writing my own log lines.

[mcookhome]

cc @akhaku, @toolbear, or @dkoszewnik - from looking at the blame, it seems like all three of you have worked on / adjacent to this feature, and I'm hoping any of you could have some ideas on how I could do this! thanks