Does not qualify as highway = path under "A trail or path that is not wide enough for a typical four-wheeled motor vehicle [3]. See highway=path, footway, cycleway, and bridleway." highway=track

For reviewers: Please focus on the specified junction (geometry + correct tagging of roads)

For review: I'm unsure if the building parts and the building are tagged correctly

I will do this as well. It is easier to add those tags with JOSM, so they will be split across several changesets

Thanks for your validation. I understood the following instructions from the task differently "Most buildings are rectangular so make buildings rectangular even if a shadow, tree or roof pitch make it appear otherwise."