SixStateObjective

The shape of the function the finite-key length optimises

2/2 passed in 476ms

Test	What it does	Result
test_corner_exact	The four-corner scan returns the residual entropy's true minimum on the compatible box to 1e-12 against a dense grid, at a Bell-compatible corner.	✅ pass
test_eve_concave	Eve's information is concave over the Bell-compatible region and strictly so somewhere on it, the shape src/lp.rs takes tangent planes for.	✅ pass