Audit batch 4: per-episode metadata Parquet at `metadata/episodes.parquet` + HF data-files config so the dataset-card viewer renders a sortable table (#13).

README.md

@@ -17,6 +17,10 @@ pretty_name: React (Tactile-Visual Manipulation)
 size_categories:
   - 100K<n<1M
 configs:
+  - config_name: episode_metadata
+    data_files:
+      - split: train
+        path: metadata/episodes.parquet
   - config_name: motherboard
     data_files:
       - split: train

metadata/episodes.parquet

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:872c7cfd8d00c6014d265b2007beac5ef5b892204872da272bae0ab3c1f8e157
+size 9490