Update longcat-video-p2 layout and qkv schema

Update longcat-video-p1 layout and qkv schema

Update longcat-video-p2 layout to layer/timestep

Update longcat-video-p1 layout to layer/timestep

Align longcat layout; upload v-dit benchmark checkpoints

Upload longcat-video-p2 (t2v alt)

Upload longcat-video-p1 (t2v)

initial commit