STOCKTON — As a first-generation low-income student from Stockton, Princess Vongchanh wasn’t going to allow her ZIP code to define who she is. Instead, she was going to let her grades and motivation to improve her community speak for itself when she started applying for colleges.The 18-year-old Franklin High School senior honestly didn’t expect to hear much of anything, let alone good news from the likes of Harvard, Yale and Stanford.Then [...]