Should the app be cleaning up leftover data from deleted watches and previous checks?

[BryanWall]

I went to the data folder to troubleshoot something and noticed that it looks like the subfolders from every watch that I've ever created are still there, even ones I deleted a long time ago. Some of them are empty and others contain various leftover files from the watch.

My question is should the app be deleting the subfolders for watches when they are deleted, or is this the expected behavior? Maybe an issue with my Docker permissions, if it's supposed to be deleting the folders?

Is #504 related to this or was it only intended to clean up the history for active watches? Would you entertain a PR for either or both?

In the meantime, the backup only seems to include the currently active watches. So it seems like making a backup, wiping the data folder, then restoring the backup would at least weed out the subfolders for deleted watches.