I actually feel like Fossil could be adapted to do this fairly easily. It uses Sqlite (it's made by the author of sqlite) so it has the same downsides describe

I actually feel like Fossil could be adapted to do this fairly easily. It uses Sqlite (it's made by the author of sqlite) so it has the same downsides described in the article, but if you could solve those problems I think it does pretty much exactly what you and the author are describing. https://fossil-scm.org/home/doc/trunk/www/index.wiki https://fossil-scm.org/home/doc/trunk/www/index.wiki