nx_sim_risk_cou_gate.nx

nx_sim_risk_cou_gate.nx -- the RISK-INFORMED CREDIBILITY framework (ASME V&V 40-2018 + FDA 2023 CM&S guidance), the structural credibility axis our census flagged ABSENT. Grounded in deep-research (verified 3-0 vs ASME/FDA primary sources): MODEL RISK = model influence x decision consequence; credibility must be COMMENSURATE with model risk; a Context of Use (COU) + Question of Interest (QOI) anchor the assessment; for each credibility factor a GRADATION of rigor is defined and a credibility GOAL is chosen commensurate with risk (a goal below the risk-commensurate level requires a documented rationale). The decisive honest insight: credibility is COU-RELATIVE -- the SAME sim is credible-enough for a LOW-risk COU yet falls short for a HIGH-risk COU. This organ grades 3 COUs of our orbit sim, computes risk->goal->achieved->verdict, encodes the FDA 9-step process + 8 evidence categories, and liar-kills any claim that a high-risk COU is met on low evidence. GREEN iff 6/6. license_tier: ORIGINAL