curl --request GET \
  --url https://api.example.com/api/datasets/{dataset_id}/filesystem \
  --header 'Authorization: Bearer <token>'

{
  "dataset_id": "<string>",
  "dataset_name": "<string>",
  "root_path": "<string>",
  "root": {
    "name": "<string>",
    "path": "<string>",
    "depth": 123,
    "file_count": 0,
    "total_bytes": 0,
    "has_children": false,
    "sample_files": [
      {
        "name": "<string>",
        "size_bytes": 123,
        "extension": "<string>",
        "path": "<string>"
      }
    ],
    "children": "<array>"
  },
  "total_files": 123,
  "total_directories": 123,
  "total_bytes": 123,
  "max_depth": 123,
  "max_entries": 123,
  "max_files_per_dir": 123,
  "source_kind": "dataset",
  "source_label": "<string>",
  "extension_counts": {},
  "truncated": false
}