Delete files examples/woundsdb_case47_day70_venous_leg_ulcer_crop.png with huggingface_hub

Six examples: 3 held-out WoundsDB (leg/hand/foot) + 3 D-Synth

DermDepth demo: dual-checkpoint (best model for depth/3D, normal-head model for normals), 3D-first UI, in-range resolution ladder, honest example provenance