D-track refresh after A100 SAM3D recovery — -AArifaAzPg_216.8_223.6

v1.7: SAM3D refill round 2 (226 PLYs, +25 from v1.6) — decoder cleanup frees 1.7GB GPU; native-res bbox crop (SAM3D internally resizes to 518)

v1.3: SAM3D meshes (164 PLYs, ~383 MB) + viser scenes with mesh layer enabled (Plan B mask scoring: area * (1-hand_iou) * static_ratio)

v1.1: 105 clips, SAM3-quality-sorted index (best→worst), WiLoR-native skeleton overlay