If that was a feeding room, it would have been a terrible place to hide Katrina.
Central to the room is one of those caskets they put on the hull. (Is it also a torpedo?)
Which might mean that all of those dead klingons were supposed to have been put into caskets and bonded to the hull, but had not been since the change in leadership, because the duty roster had gone to shit. It's still the corpseroom, but the morticians who put these warriors to rest, are not doing their jobs, so the corpse mutilation is probably just from random rat-like vermin that hides in the walls and crawlspaces taking advantage of improperly stowed meat.
Were they "wasting" food on Katrina? Considering how quickly they revert to famine conditions, can they waste food on a prisoner, they might space at any moment?
From scavenging the battle of the binary stars, if Klingons can only eat life food, they might have stockpiled plenty of freeze dried human food... But I can also see them trying to feed the woman a small bucket of excrement twice a day.