NEW YORK — For more than a year, Felix Santiago has worked as a barista at a Starbucks near Times Square, and for about half that time, he loved it. It was easy to swap shifts, easy to pick up new ones, easy to get along with supervisors who were largely accommodating. “The first six months were absolutely great,” Santiago said recently. His opinion changed when his hours were cut in October and then again in January. Sign up for The Morning newsletter from the New York Times Overall, they had f