Greetings Eoghan!
I wholeheartedly agree, this is worthwhile to get on everyone's radar.
As far as I'm aware, this topic has not come up before in the OpenInfra community, but we are a wide and diverse community. I do concur that this would fall into the scope of the board, in large part because we maintain authority over licenses and the acceptable copyrights. And as you've pointed out, this can quickly result in needing to dive into the license agreements and assignments which members commit to.
Realistically, I think if we opted to permit AI generated code content, the content would still need to be denoted in the code itself under current USPTO guidelines, because the code in a single commit would then have two different sets of rules applying to it. One for the AI generated portion, and separately a human's influence over it. That being said, that is only my mildly caffeinated impression after doing some additional reading.
I think a working group session may be a good starting place to collect thoughts from the board members. Meanwhile, I've added Thierry to the discussion because this might be something already on the staff's radar.
-Julia