Vanderpump Rules veteran Stassi Schroeder made her runway debut during the Sports Illustrated Swimsuit portion of Miami Swim Week on Sunday, May 31. What should have been a triumphant moment for her turned into a lightning rod for social media criticism. She was mocked for departing from the traditional catwalk posture and entering the stage with her hips swaying in a manner that put her “pelvis first.” Some suspected the move was a failed attem…