Registry subtype tiers: SARC_RMS/SARC_LPS/SARC_ESS as real registry codes (parent=SARC, no leaf re-parenting); UCEC split into TCGA molecular classes (POLE/MSI/CNL/CNH) replacing the conflated bulk aPD-1 ORR (UCEC_MSI 50% vs MSS ~6%). Closes #368. In-wheel data; DATA_VERSION unchanged. See #370.
