ST. LOUIS — After a string of edge-of-your-seat barn burners, the Blues entered the All-Star break with a smudge of a hockey game. In a 1-0 loss to the Blue Jackets on Tuesday night, both St. Louis and Columbus struggled to generate … anything. Through two periods, the two teams combined for 21 shots. The power plays failed to threaten. The goaltenders were untested. The 0-0 tie was erased from the scoreboard 4:11 into the third period when Dmitri Voronkov scored for Columbus. The game was an outlier for the Blues, who won their previous three games in overtime. Across a five-game win streak…