Currently WAWLA shows villager profession, but it seems as of 1.12.2 they also have professions that don't change when they are zombified. I'd love to know what profession a villager has before I cure him as that would speed up my diversity project by quite a bit.

Thanks for the request. This is already a feature and is confirmed working on 1.12.2. Please make sure you are using the latest version of the mod.