[Fix] Update dataset conversion for InternData-N1 VLN-PE v0.5 dataset format #200
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Description
The InternData-N1 VLN-PE trajectory training dataset is being upgraded from v0.1 → v0.5, introducing minor structural changes in the dataset layout. This PR updates the LeRobot_to_LMDB conversion logic to align with the new v0.5 data structure. The training dataset of rdp and cma are updated as well to match the new key name, 'instruction_text' -> 'task'.
Implemented by Liu Yu.
Breaking Changes
The updated conversion logic is not compatible with InternData-N1 v0.1
This PR must be merged only after the dataset upgrade to v0.5