Gloria Martinez has a million-and-a-half items on her to-do list. Quite literally: Give or take a few hundred thousand, that’s the number of unique objects in the MIT Museum’s astonishingly diverse collection. Martinez is supervising the collection’s move to a new storage facility — the final step in delivering the new museum, whose headquarters opened last fall in the heart of Kendall Square. Only a tiny fraction of the huge collection is on display at the popular new museum. Working under tight deadlines, Martinez and her team are painstakingly gathering…