SAN FRANCISCO – Before making his Warriors debut Thursday night, Kristaps Porzingis wanted to feel the court. To show himself he was ready for what’s to come. It had been 43 days since he appeared in an NBA game. His angular 7-foot-2 body needed to become reacquainted with high-velocity activity.So, he went prancing about the floor, running sideline-to-sideline sprints during every first-quarter break and again when the quarter ended. Satisfied, he stripped his sweats and walked out to open the second quarter.By the time Porzingis went to the bench four minutes later to catch his breath, the Boston Celtics had reeled off a 17-2 run, setting the tone for a 121-110 roasting (the 11-point margin is highly deceptive) of the Warriors.Welcome to the Bay, KP. Every game won’t feel this futile.“Far from being in perfect shape,” Porzingis said. “But the first game back, after a while getting some energy back, feeling good.”The reality is there will be more nights like this for a Golden State team without franchise icon Stephen Curry for at least the rest of February and without No. 2 scorer Jimmy Butler III for the rest of the...