Yeah, reading the article, it sounds like they’ve decided to park at the space station because the parts that malfunctioned during the journey to the space station were not designed to survive re-entry, meaning that they won’t have the opportunity to understand what went wrong with them after they return to Earth. So they’re delaying the departure in order to collect as much information as possible about what went wrong in the first part of the mission. They’re still confident that a safe return is going to happen.
“Jones” is an American slang word meaning to be addicted to something, so “jonesing” for something means to crave something very strongly, and generally very vocally.
“Breve” is a coffee drink that is commonly made with half-and-half, which is a product that is equal parts cream and milk. I assume that people have taken to using the term to refer to half-and-half itself, but I’ve not personally heard that.
So the sentence is saying that their cat was addicted to half-and-half and would act like a junkie doing anything to get their next fix.