I'd doubt it would be feasible. The reason coach BoBs have the
information available is that they are pretty invariant, whereas
premium cabin meals change from time to time. The only way to
solve the issue with food sensitivities is to put in a request for a
special meal, which one can't do for waitlisted upgrades (for
example). Even asking the serving FA isn't going to be an
infallible solution. It's a BYO situation, but I've heard tell that an
upfront flyer can plead allergy and be given a snack box from the
back.