This is the core problem, though: it's difficult (impossible?) for someone to be professional when everyone around them is so unprofessional. Worse still when none of their claims are fully addressed by management.
There was no resolution here. I don't blame her for taking these steps to out Github.
That only more reason to be extremely professional - noone can blame anything on you. Or maybe it's just my viewpoint of the world, but I would take the most defensive route possible, and use the experience to my advantage (learn as much as possible, gain relevant & valuable experience, eject into another company as high as possible).
There was no resolution here. I don't blame her for taking these steps to out Github.