Poll the status of an asynchronous task. Returns the current state of the task and, when complete, the result or error. This endpoint is generic — it works for any task enqueued by an asynchronous Sefaria API (e.g. POST /api/find-refs).

States:

• PENDING — The task has not yet started (or the task ID is unknown).
• STARTED — The task is currently being executed.
• RETRY — The task failed and is being retried.
• SUCCESS — The task completed successfully. The result field contains the task output; its shape depends on which API enqueued the task.
• FAILURE — The task failed permanently. The error field contains the error message.

HTTP status codes:

• 202 — Task is still running (state is PENDING, STARTED, or RETRY).
• 200 — Task completed successfully.
• 500 — Task failed permanently.