You may have heard the announcement earlier this month about the STL Square Off, the city's first-ever St. Louis-style pizza festival, which is scheduled for Berra Park (1825 Macklind Avenue) from noon to 5 p.m. on October 8. You may even recall that it will feature eight local pizza purveyors, each of them bringing their own take on St. Louis-style pizza — cracker-thin crust, Provel topping and all — to compete for the title of "Best St. Louis-Style Pizza."…