- media color primaries/transfer tags now flow from the FFmpeg probe
through VideoParams into Footage::get_colorspace_to_use(); precedence
is user override > media tags > project default
- export nclc tags derive from the output colorspace (PQ/HLG/BT.2020,
P3, sRGB, Rec.601, Rec.709) instead of hardcoded BT.709
- new OCIO Color Grading (Log) node (lift/gamma/gain) and White Balance
node (kelvin temperature + tint, HDR-safe)
- LUT whitelist extended to 9 OCIO-supported formats
- waveform scope gains an RGB parade mode (GPU and software paths)
- tests updated for the new colorspace precedence