Merge branch 'main' into feat/language-columns

Resolved conflicts:
- docs/source/_toctree.yml: keep language_and_recipes + tools (PR) and
  video_encoding_parameters (main); drop dataset_subtask, removed by this PR
- src/lerobot/configs/__init__.py: keep both load_recipe (PR) and the
  VideoEncoderConfig exports (main) in __all__
- uv.lock: regenerated via 'uv lock' against the merged pyproject.toml

tests/utils/test_process.py

@@ -22,7 +22,7 @@ from unittest.mock import patch
 
 import pytest
 
-pytest.importorskip("grpc")
+pytest.importorskip("datasets", reason="datasets is required (install lerobot[dataset])")
 
 from lerobot.utils.process import ProcessSignalHandler  # noqa: E402
 

tests/utils/test_replay_buffer.py

@@ -19,7 +19,6 @@ from collections.abc import Callable
 
 import pytest
 
-pytest.importorskip("grpc")
 pytest.importorskip("datasets", reason="datasets is required (install lerobot[dataset])")
 
 import torch  # noqa: E402