Fork to Fit Kitchen, the health-focused fast-casual chain born in the Rio Grande Valley, is staking out territory in the San Antonio market with a compact shop at Schertz Station. The company has lined up a roughly 1,209-square-foot unit inside the I-35 development north of the city, joining a fast-growing roster of restaurants in the corridor. According to San Antonio Business Journal, Fork to Fit Kitchen will occupy the 1,209-square-foot space…