Even Albert Pujols has limits. So far, the Cooperstown-bound slugger’s reunion with the Cardinals has gone about as well as any realistic observer could have hoped. So much so that Cardinal Nation, a fan base full of National League loyalists, is cheering a designated hitter. Pujols, the recipient of a one-year, $5 million deal that will surely wind up making the Cardinals more money that it cost them, is powering up against lefties, as expected. He’s averaging .335 with a .389 on-base percentage and a .613 slugging percentage against southpaws. What worked for the Dodgers last season is worki…