ATTR_PROVIDER_REQUEST_IDS: "lk.provider_request_ids" = 'lk.provider_request_ids'

Provider-known correlation ids associated with this span (string[]).

Populated by STT/TTS plugins when the id is either sent to the provider (e.g. WS context_id) or returned by it (e.g. response request_id / session_id), so it can be cross-referenced with the provider's logs for debugging.