Embedded CIE reference data
===========================

`cmf_1931_2deg.json`
  CIE 1931 2° colour-matching functions x̄(λ), ȳ(λ), z̄(λ), 360-830 nm
  (1 nm). Extracted from `src/navette/data/CIE/cmf/CIE_xyz_1931_2deg.json`.

`illum_d65.json`
  CIE standard illuminant D65 relative spectral power distribution.
  Extracted from `src/navette/data/CIE/sds/CIE_std_illum_D65_S_D65.json`.

Attribution: data © CIE, reproduced under CC-BY-SA 4.0 as labeled
upstream. Values are unmodified; only the file envelope was reformatted
(minimal `{wavelengths, …}` JSON) by `tools/extract_cie_defaults.py`.
The share-alike obligation binds these data files, not the crate.
`tools/check_cie_sync.py` (CI) fails loud on any drift vs the sources.
