After the two latest replies I'm even more confused than before ... LOL!
I hope you don't mind me saying this Viking, but I find your bafflement quite instructive. You might like to read
an old blog post about canonicity by a Doctor Who writer. In short, every body of fiction has a different attitude about what "officially happened" in their universe, from "it happened if The Creator says it happened" to "it happened unless the current rights holders say it didn't happen" to "whatever happened in your Whoniverse is between you and your Doctor".
For the past three decades, Elite canon has mostly existed in the form of winks and nods. Combined with a huge universe and a community full of dreamers, this has fed a very inclusive sense of canonicity. A great example is how Lave grew from a system simply described as "most famous for its vast rain forests and the Laveian tree grub" to
a mass-deforesting dictatorship run by one Dr. Waldon to
a place run with an iron fist by a quasi-mortal being (see page 119), and now on to
a burgeoning democracy.
We all kinda know this will have to be reined in with the new game. One of the fiction authors was recently careful to remind me
only Michael Brookes can make pronouncements about canon right now. But he's way too busy to start laying down the law, and it's probably quite a difficult question anyway. For example, there's a lot of talent sloshing round here and a lot of little bits of content needs writing. Who's to say the community won't be asked to continue dreaming up
missions and
system statuses in future?
So what you're reading right now is the dreams of players, nodded at by
the fiction diaries,
gazeteer, and other works such as the story linked in the OP. How much of this really happened? For now whatever you want, just remember to let the Chewbrookie win.