DENVER — During one of his final visits here as an opposing player, in December of 2019, Carmelo Anthony was tugged forward, invited to gaze at the future. He was questioned about the eventual end of his storied career — which officially arrived with a retirement announcement on social media Monday after 19 NBA seasons — and asked to envision where his jersey would one day be hung. Advertisement “This is where it should be retired, to be honest with you,” Anthony said that night. “Just my opinion, man. The history is here. This is where it all started.” Then,…