Activists joined the family of Jamel Floyd outside the Metropolitan Detention Center in Sunset Park Thursday night to mark the one-year anniversary of Floyd’s death — where Floyd’s parents vowed to bring a wrongful death lawsuit against the federal lockup. “I am in so much pain, I couldn’t even describe it,” Floyd’s father James said to the crowd of about two dozen people. “But, life goes on and we’re here to fight and let the folks in this facility know that we’re gonna fight with all our might.” Floyd died on June 3 of last year at MDC, after being pepper sprayed in the face by jail…