weights: backbone-only extract of Sense-X/UniFormer Mask R-CNN 1x UniFormer-S_h14 (GDrive id 13KhBYkH... via scripts/convert_uniformer_dense_backbone.py)

docs: add Apache-2.0 LICENSE per s4(a)

docs: add NOTICE attribution per Apache-2.0 s4(d)

docs: acaua mirror model card with code+weights provenance

initial commit