Like so many in the South Asian diaspora, 37-year-old Tamil Swiss singer and rapper Priya Ragu is hungry for art that speaks to the complexity of our experiences. She has said that there’s no single theme to her new album, Santhosam, which touches on topics as varied as combating familial pressure, craving a vacation, and contesting police brutality. But throughout her career, her work has centered around her desire to express her perspective as the child of Sri Lankan refugees and to reach other South Asian listeners in the process. She…