PHILADELPHIA — Diniar “Melo” Camp was only supposed to be in Philadelphia for five days. The 26-year-old, who was born and raised in South Philly, had moved to Nevada in April to pursue his music career and to feel safer, living away from Philadelphia’s escalating gun violence crisis. He’d lost too many friends to shootings, and couldn’t bear to imagine his mother go through that pain. But on July 27, tragedy struck. One of Camp’s best friends, Joelill Foy, his roommate in Nevada who had recently returned to Philly to care for a newborn child, was fatally shot outside his South Philadelphia ho…