This would provide a way for issue follower to know that when fixes/features have been released in insiders.

We have logic for this already in the author-verification-requested bot, but this has some issues:

• when no commit is found, it fallsback to close time. this is incorrect in endgame.
• it leaves comments explicitly pinging all followers. this has potential to be annoying when enabled for all issues.
  • perhaps work with labels instead (awaiting-insiders-release, insiders-released)