It seems that if you have /.well-known/webfinger redirect, you become discoverable on Mastodon using your own domain. E.g. following "@[email protected]" will now actually follow "@[email protected]", I think. But is there some way to make that mastodon.social address actually present itself as "@[email protected]" and make that be my canonical address? I would like that address to be the one that ...
What frustrates me is that it's entirely possible to write an external app to do post-migration. it wouldn't have to run on the same server or even be in the same language (Masto is written in Ruby). I just haven't had time...
(The one catch is that I'm not sure if the API allows backdating new posts -- but that could be ameliorated by adding a header or footer indicating that the post was migrated, and its original timestamp.)