Really close to having it work, but there seems to be an error when uploading files, which causes particularly annoying problems on WSL when testing, so I'm commiting and trying on my desktop.
Scrobble processing appears noticeably slower (according to the logs), so I think rules are going to be something to optimize later. Fortunately, they shouldn't need to be applied too often
They couldn't see the changes made by rules after uploading Scrobbles which made it seem like the rules weren't being applied. Also makes Album rules easier to apply I believe.
