Aug 27

1. 13:37

   Restore nested checkpoint layout for TurboT2VA

   luyu1021
   Verified signature

   29b969f
2. 13:30

   Rename AV checkpoint to VA and flatten paths

   luyu1021
   Verified signature

   83f54b3
3. 13:30

   Duplicate from luyu1021/TurboT2AV

   luyu1021
   6d28c88