The University of Utah acknowledged for the first time that the on-campus murder of track star Lauren McCluskey was “preventable” and agreed to pay her family $13.5 million to settle a lawsuit in the case.The 21-year-old student was fatally shot outside her dorm in 2018 after repeatedly asking campus police to investigate a man who had been harassing and blackmailing her for weeks. Police not only failed to protect her, but the cop in charge of the case bragged about having explicit photos of her and cracked jokes about them to fellow officers.Thursday’s historic agreement, obtained by The Sal…