Add an opt-in repo_type="bucket" parameter to StreamingLeRobotDataset
and LeRobotDatasetMetadata so a dataset can be streamed directly from an
HF Storage Bucket (hf://buckets/...) with no local download.
When repo_type="bucket":
- skip git-version resolution (buckets have no refs/tags),
- pull the meta/ directory via HfFileSystem.get,
- point url_root at hf://buckets/{repo_id},
- read parquet shards via load_dataset("parquet",
data_files="hf://buckets/{repo_id}/data/*/*.parquet", ...).
The default repo_type="dataset" preserves all existing behavior.
LeRobotDataset (non-streaming) and create() are unchanged.
Closes#3969
Signed-off-by: Sundar Raghavan <sdraghav@amazon.com>
* chore: replace hard-coded 'action' values with constants throughout all the source code
* chore(tests): replace hard-coded action values with constants throughout all the test code
Sundar Raghavan