Zero-based numbered page. Pages whose required ordered work exceeds the finite read contract return HTTP 422 with code page_depth_exceeded; request an earlier page or narrow the time range.

Opaque continuation token returned by the previous page. When supplied, do not also send the numbered-page parameter.

JSON-encoded list of custom attribute keys to hydrate; only requested keys are returned. Each key resolves to its latest live span value by (start_time, span_id). Comma-separated simple keys remain supported.

Omit for backward-compatible complete bounded pages, which may label total_rows as a lower bound. Send false to require an exact total. Send true to opt in explicitly to lower-bound totals and, on the first page, a clearly labelled bounded partial result when the full ordered prefix cannot be proven inside the read budget.