Function status_url 

pub fn status_url(
    api_uri: &str,
    tenant: &TenantId,
    project: &ProjectId,
    job_id: &str,
) -> Result<Url, OperationOutcomeError>

The absolute URL the client polls for a job: sibling of the project’s FHIR root, so the same token authorizes it, but outside the FHIR routes since neither its response codes nor its bodies are FHIR interactions.