SAN DIEGO — Stuck in a skid that has jeopardized their season, the Giants at times over the past few weeks have been hard to watch. All year, though, Carlos Rodón’s starts have made for can’t-miss baseball. In a 3-1 win Saturday against the Padres, Rodón turned in possibly his best performance yet, retiring 22 of the final 23 San Diego hitters he faced on his way to a complete game. Wilmer Flores broke a 1-1 tie in the eighth with a two-run homer to left that gave Rodón all the padding he needed to secure the Giants’ first win in three games this series and only their second in the past 10 gam…