Ingest Traces

Ingest a batch of traces in the canonical Traces list shape.

Accepts a list of trace records (each trace_id plus nested spans). Internally normalized into the same pipeline as POST /tracing/spans/ingest. Use this when you already hold data in the Traces list shape — for example, replaying traces from another environment.

Returns 202 Accepted with the list of accepted trace_ids. See Tracing — Async write contract for what count means here.