rest
Minimal authenticated Databricks REST helper. Pulls the workspace
host and a fresh bearer header off an OBO-scoped WorkspaceClient
(client.config.getHost() + authenticate()), then issues a plain
fetch. Used by modules that hit REST surfaces without a typed SDK
method (e.g. the MLflow assessments API); returns the raw Response
so callers decide how to treat status codes. Also carries the
defensive Response body readers those callers share.