NTC Thermistor 3-Point Steinhart-Hart Fitter & Branchless C Lookup-Table Generator

Deterministic Exact 3x3 Vandermonde linear system for Steinhart-Hart 1/T = A + B*ln(R) + C*(ln(R))^3 + inflection-point pull-up R_opt = R(T_mid)*((B-2T)/(B+2T)) & piecewise-linear LUT engine (.h, .c, .csv, .json) built for Vishay, Murata, TDK Epcos, Semitec (104GT-2) — zero-upload ephemeral Wasm RAM execution.