HealthBench Professional → HLE w/o tools

HLE w/o tools is estimated from HealthBench Professional with a Michaelis–Menten + offset curve fitted on 5 models measured on both: y = 0.0000 + 2.0000·x / (1.62405 + x), R² = 0.70, cross-validated error 5.9 pp. It is used for 0 estimates.