//! kelly_f monotonically decreasing in Q-variance.
#[test]
#[ignore = "Phase 2B contract — green via existing Kelly; requires Q-variance sweep harness"]
fn test_2_19_kelly_calibration() {
    // Phase 2B.b: trainer.set_q_variance_for_test(v) + read kelly_f from ISV.
    // Sweep v ∈ {0.01, 0.1, 1.0}, assert kelly_f[0] > kelly_f[1] > kelly_f[2].
}
