Upstream changelog used to be in debian/changelog , which is now used for packaging. The upstream changelog has been relocated to /usr/share/doc/<package>/changelog.gz .
vendor Golang module github.com/n8jja/Pat-Vara Instead of introducing a new package for n8jja/Pat-Vara, the module is vendored in as a patch. This is discussed on-list in: https://lists.debian.org/debian-hams/2022/09/msg00001.html