VTM-1.5.1: 1-step SFT distill (CFG baked in) + Ultra fast decoder + 60 fps demo

Update model card: VTM-1.5.1, VTM Spark, demo, files and licences

Add trackers/pose_landmarker_lite.task

Revise model card: architecture, 7 FPS note, method figure

Upload VTM-elf.pt-000060000

initial commit