I'd be in favor of having some standard "code review markup language", which could contain review comments and workflows. Then you would be able to put these in files and make those files part of your repository (ie commit/push).
Then, you could build various frontends to handle these in a user friendly way if you like. But also, would be accessible and editable in your favorite text editor.
Then, you could build various frontends to handle these in a user friendly way if you like. But also, would be accessible and editable in your favorite text editor.