It looks good and I’ll write a letter of recommendation later today.
A suggestion: in the part And if so, can you tell us a bit about your contributions? could you add URLs to some contributions that show your Ruby skills? And any other forge related work you may have done in the past would also help a little, I think.
In the compare section you may also want to mention Forgejo and @Dodecahedron’s work in particular at #59 - [FEAT] implement federation - forgejo - Codeberg.org. There is also F3 that could be helpful to sync projects (or part of them) between GitLab and Forgejo. And the F3 integration with Forgejo that is in the works.