Gate A: clean false fires are a reported warning, not a failure; main set (5 seeds x 3 families) vs diagnostic sweep

Add model card

Add all family (r=64, k=8, seeds 42-46)

Add l1523 family (r=64, k=8, seeds 42-46)

Add l19 family (r=64, k=8, seeds 42-46)

initial commit