LeRobotDataset:v3.0 — streaming data and multi-episode support

AI Impact Summary

The LeRobotDataset:v3.0 release introduces a significant change to data storage, shifting from single-episode files to multi-episode files within a relational metadata structure. This change enables streaming functionality and dramatically improves scalability for handling large datasets, particularly by consolidating data across multiple episodes into single files. This migration requires careful consideration for existing workflows and tools, as the new format necessitates adjustments to data access and processing pipelines.