fix: scale VTK mm coordinates to meters when exporting to OpenUSD#45

aylward merged 4 commits intoProject-MONAI:mainProject-MONAI/physiomotion4d:mainfrom

aylward:claude/fix-vtk-usd-units-jFECHaylward/physiomotion4d:claude/fix-vtk-usd-units-jFECHCopy head branch name to clipboard