PASS 1: keys exactly ['multi_beam_samples', 'si_thickness_um', 'sic_thickness_um']
FAIL 3: sic=7.3362 vs 7.604 err=3.522% (tol 3%)
PASS 4: si=3.3997 in [3.0, 4.8] um (sanity bound; reference 3.814)
PASS 5: multi_beam_samples=['Si']

=> REJECT
