Multilingual feature-port bundle (features-fixed@b1203a59a)

Rebuild adjacent-boundary geom segmenter for bibr runtime

Update geom segmenter to adjacent-boundary v2

phase4r hybrid pdf-line geom segmenter

v2: add early_year_paren feature (val F1 0.9743; fixes psych corporate/diacritic-author merges)

Add v1 geom segmenter (val boundary-F1 0.9736, train 357/val 85)

initial commit