Get status of “Upsert courses” task

Poll for the status of an existing “Upsert courses” task.

<Info> This endpoint returns the current status of a task. Poll it at regular intervals until the task reaches a terminal status. Learn more in our [async endpoints guide](/lms/guides/async-endpoints). The possible statuses are: - `PENDING` – The task is still being processed. - `COMPLETED` – The task finished successfully. The `data` field contains the results. - `FAILED` – The task encountered an error. Check the `error` field for details. </Info>