torch 2.7.1 (oldest lerobot-allowed; cu126 wheels init on the L4 driver)

pin torch 2.5.1 (cu12 family the endpoint L4 driver supports)

pi05 image: python:3.12-slim base (pinned lerobot needs py>=3.12)

pi05 serving image (serve/ @ Lab main, MODEL_KIND=pi05)

initial commit