Fix TIFF decoding of legacy 8-bit color maps
Merged
JI
1mo ago+50+50+01234567890123456789-12-12-01234567890123456789
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Description
Fixes #3182
Fixes near-black TIFF output when ColorMap entries use the legacy 0–255 range. Uses SIMD-backed range detection to select the correct palette scaling and adds synthetic regression coverage for both 8-bit and 16-bit color maps.