MIAMI — The trade the Miami Heat pulled off on Tuesday — it was about time in a couple of ways. It was about time club president Pat Riley made a move to help rescue this listing season, one bogged down by subpar offense and likely not going far in the NBA postseason. And it was about time more literally for departing Kyle Lowry. At age 37, he would run out. Miami did well to foist the fumes of his ebbing career on somebody else and enjoy a huge, immediate upgrade in return. Riley the maestro is in his own career’s winter at 78, but he doesn’t have to run or shoot anymore. He only needs parlay…