Release v0.4.2

What's Changed

• chore(dependencies): Bump lerobot to 0.4.2 by @imstevenpmwork in #2423
• Fixes in port droid scripts by @michel-aractingi in #2455
• Fix episode filtering bug when requesting a subset of the episodes in a dataset by @michel-aractingi in #2456
• [RTC] Real Time Chunking for Pi0, Smolvla, Pi0.5 by @helper2424 in #1698
• feat(envs): add envs pre-post processor by @jadechoghari in #2474
• Add absolute_to_reative_idx for remapping indices to fix delta_timestamp bug by @michel-aractingi in #2490
• docs: Add LeIsaac x LeRobot Envhub tutorial by @jadechoghari in #2498
• feat(dataset): speed-up encoding time by @imstevenpmwork in #2514
• feat(dataset): dynamic compress_level depending on the type of dataset (video or image) by @imstevenpmwork in #2517
• fix(examples): wrap all of them into a main function by @imstevenpmwork in #2524
• feat(parallel encoding): making parallel encoding the default choice over all platforms by @CarolinePascal in #2525
• fix(benchmark) : fixing video benchmark by @CarolinePascal in #2094
• feat(utils): precise_sleep() less CPU hungry without sacrificing accuracy by @imstevenpmwork in #2526
• fix(scripts): better prints teleop by @imstevenpmwork in #2538

Full Changelog: v0.4.1...v0.4.2