At the end of Discovery's first season, mirror universe Terran Emperor Georgiou joins the crew of Discovery. While the mirror universe is declared a secret and Georgiou is presented as her prime universe counterpart Captain Georgiou to the outside world, virtually anyone aboard Discovery has been to the mirror universe and is probably aware of what is going on.
At the end of season 2, Discovery
departs to the far future.
At this point, keeping up all the "vows of silence" makes no sense anymore.
Not at last because many of those orders to keep things secret concern Discovery itself.
What's the point of still treating mirror-Georgiou as if she were a member of the crew? In 3x04, she is even invited to Saru's dinner, along with the bridge crew (and only the bridge crew!), as if she were a close friend or an especially esteemed crewmember of any sort.
I understand why exiling her somewhere may be considered too risky, given the improbable skill and willingness that she demonstrates to use anything and anyone she finds to her advantage. But why in the world is this character not locked up in a brig?