Cycling .FIT Chung Virtual-Elevation Aerodynamic CdA Field Wind-Tunnel Solver

Deterministic Chung Virtual Elevation power-balance ODE integration + Nelder-Mead nonlinear least-squares loop-closure regression for CdA & Crr engine (.fit, .tcx, .csv) built for Garmin Edge, Wahoo Elemnt, Favero Assioma, SRAM Quarq — zero-upload ephemeral Wasm RAM execution.

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