Task 452: Cross-Validate Jupiter Radiation Module

Status: DONE

Summary

Cross-validated Jupiter radiation module with independent Python implementation. Added 21 checks to validate_supplementary.py covering dose rates at 8 distances, transit dose integrals (scipy.integrate.quad), shield budget calculations, EP02 scenario, minimum survival velocity, monotonicity, and ratio checks. Fixed check() function bug where rel_tol=0 caused exact-match failures (0 < 0 → False, changed to <=). All 186/186 supplementary checks pass.