Trace Usage

Request to compute per-call usage for a trace, with descendant rollup.

This endpoint returns usage metrics for each call in the trace, where each call's metrics include the sum of its own usage plus all descendants' usage. Use this for trace view where you want to see rolled-up metrics per call.

Note: All matching calls are loaded into memory for aggregation. For very large result sets (>10k calls), consider using more specific filters or pagination at the application layer.

Response with per-call usage metrics (each includes descendant contributions).