Football is a game of geometry played by young men who hit like sledgehammers, and while the class of 2029 might sound like a date printed on a science fiction novel, the race to secure its most violent architects is already underway. Under the halogen glare of a Texas Friday night, the evaluation never sleeps. Enter Klein High School’s C'Ivion "Cash" Hines, a 6-foot-4 sophomore who plays the linebacker position not just with malice, but with a terrifying diagnostic clarity. Ranked as the No. 18 overall athlete, the No. 2 linebacker in the nation, and the No. 4 athlete in the Lone Star State…