Chroma-Key Cyclorama IRE Uniformity, Channel-SNR & Spill-Distance Auditor

Deterministic Log/Rec.709 chroma-purity vector distance + Lambertian diffuse cyclorama form-factor spill irradiance integral F_cyc->subject engine (.png, .tiff, .exr, .pdf) built for Boris FX Primatte, Foundry Keylight, Ultimatte, Kino Flo — zero-upload ephemeral Wasm RAM execution.

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