AP: Mastodon reply fetching #2279
Description
Currently, BF does not support the “reply fetching” feature of Mastodon, whereby an instance can be queried for new replies to a remote post. This would be beneficial to implement, especially when it comes to fetching bridged replies to bridged posts on Bluesky. This would also eliminate the need to manually fetch old replies by just-bridged users to old bridged posts, as this feature could be used to make that happen automatically.