test: regenerate seq-* test images using libtiff C API

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Replace Python-generated test TIFFs with libtiff-generated ones to
eliminate circular validation. The C program (gen_seq_tiff.c) uses
libtiff's TIFFWriteScanline with MSB-first packed bit streams.

Cross-validated: tifffile independently confirms all 27 images match
the original Python-generated versions byte-for-byte. tiffinfo validates
all IFD structures. All 27 image-tiff decode tests pass unchanged.

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Lilith River committed 2026-03-10 06:02:19 -06:00

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commit 26c32431fa

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tests/images/seq-3c-14b-planar.tiff

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