The Panopticon/The Cushing Conundrum

As has already been mentioned in Thread:231309 before it was closed (for unrelated reasons) recently the novelisation of The Day of the Doctor mentioned that two Dalek films starring Peter Cushing existed in the Doctor's universe and that the Doctor was friends with him.

This brings me to the issue at hand: This evidence inspired a section on Dr. Who's titled "As a fictional character" detailing instances from the novelisation and previous instances of these films being refereed to. More recently the name of the in-universe section was changed (by me) after multiple circumstances of the Cushing Doctor seemingly existed in the Doctor's universe.

There is a core problem with this which is a page of this type cannot be part of the four main categories (i.e in-universe and invalid in this case). This issue also exists with people from the real world who played themselves like Bill Turnbull but that's a thing for another time.

My question: how do we best deal with this situation?