ReqLLM.OpenTelemetry.OTelAdapter (ReqLLM v1.13.0)

Default ReqLLM.OpenTelemetry.Adapter implementation, backed by the Erlang OpenTelemetry SDK (:otel_tracer, :otel_span, :otel_meter).

Used automatically by ReqLLM.OpenTelemetry.attach/2. Public so that custom adapters can defdelegate the callbacks they don't need to override — see ReqLLM.OpenTelemetry.Adapter for the wrapping pattern.