I haven't read the book, but this quote:
Seems to imply some permanency as it says "instead of returning to the Republic". Why would it say that if she was simply working with them on that mission and then returned to the Republic?
I haven't read the book so you could very well be right, I'm just confused why the article would be so misleading.
Have you actually read the book or are you interpreting from the article as well?
Potentially maybe she wasn't meant to join them, and was meant to go back to the Republic straight away. If she made the choice then, it could be written as that she decides to join them for the mission instead of returning to the Republic. Per chance, at least.