Returns the current status and progress of any previously initiated asynchronous job for an audience. Covers all job types: AUDIENCE_CREATE, AUDIENCE_ENRICH, and ROW_UPSERT. Provide the audienceId and jobId returned by the originating operation. The response includes the job status — one of SCHEDULED (queued), RUNNING (actively processing), SUCCEEDED (finished successfully), PARTIALLY_SUCCEEDED (completed with some failures), FAILED (terminated with errors), or CANCELLED — and a percentProgress value. Returns 200 with the job status resource. Returns 404 if the audienceId or jobId does not exist.