By Matt Hladik The New York Yankees did not make any high-profile free agent additions this year, and Sunday’s signing certainly doesn’t qualify as one. The Yankees announced this afternoon that they had signed right-handed pitcher Shelby Miller to a minor league contract with an invite to big league spring training. Once upon a time, this might have been seen as a big deal. Miller made his MLB debut in 2012 and was regarded at the time as one of the best prospects in the sport. In 2013-14, he went 25-18 with a 3.41 ERA with the St. Louis Cardinals, and he made the All-Star Game with the Arizo…