CHICAGO —The 30th anniversary of the Great Chicago Flood of 1992 was two weeks ago, and it was a crisis that submerged the Loop in 124 million gallons of water from the river when an abandoned subterranean tunnel was breached during repairs to one of the bridges downtown. The psychological thriller “Shining Girls” on Apple TV+ may be fiction, but it takes this moment in history as its starting point: It’s the spring of 1992 and the flood has unexpectedly led to the discovery of a woman’s mutilated corpse. The markings on her body are similar to the scars left on the body of one Kirby Mazrachi …