Alpha: This API may change without notice; not recommended
for production use.

Returns a single dataset by ID. The response body is the same
Dataset-Resource shape returned by the list endpoint.

Set expand=true to inline reference fields (createdBy,
updatedBy, managedBy, defaultDashboard,
defaultInstanceDashboard, storageIntegration.record). Without
expand, references contain only id.

To look up a dataset by label or other attribute, use
GET /v1/datasets with a CEL filter.