Returns the current status and timestamps of an asynchronous audit export
task created via POST /v1/audits/query-tasks, for the authenticated
user's tenant.

Tenant is derived from the user token — do not pass tenant as a path or
query parameter.

Polling: Poll this endpoint until status is Success or Failed.
While the task is in progress, status is Queued or Working. When
status is Success, retrieve the result from
GET /v1/audits/query-tasks/{taskId}/download. The completedAt field is
populated only once the task reaches a terminal state (Success or
Failed).

Rate limit: Tier 3 (600 requests/minute per tenant) to support polling.