MSERC — Mycelia Equity Regime Composite. 2D framework: Health (MSLI×0.6+MSBI×0.4) vs Stress (MESI×0.6+MNVI×0.4). Net score -100 to +100. Regimes: RISK_ON/VOLATILE_BULL/MILD_RISK_ON/NEUTRAL/MILD_STRESS/DEFENSIVE/STRESS. 300s cache. — Ed25519 signed attestation