Need to pull agent utilization metrics (tHandle, tAcw, tHold) broken down by 30-minute intervals via the Analytics API. Tried POSTing to /api/v2/analytics/users/queues/report with interval=PT30M, but the response aggregates everything into daily totals instead of returning the granular buckets. The JSON payload looks correct for standard queue reports. Am I missing a specific parameter to force the 30-minute grouping?