feat: kraken blla baseline segmentation as primary /segment engine (docTR fallback)

segment: ascender/descender-aware line padding (Transkribus-style polygons)

Add torchvision for doctr

Pango/cairo/harfbuzz libs for doctr import

Add libgl1 for doctr's opencv dependency

docTR layout segmentation endpoint

Informative root route for the Space page

Pin numpy<2 (torch/cv2 ABI compatibility)

Fix Space metadata emoji, drop pycache

BiLinguaScript HTR API