Function emit_batch_summary

app/workflow/file_sink.cpp:323–345

            audio.sample_rate,
            audio.channels,
            audio.samples,
        });
        std::cout << "audio_out=" << audio_out->string() << "\n";
    }

    if (!result.named_audio_outputs.empty()) {
        if (audio_out_dir.has_value()) {
            std::filesystem::create_directories(*audio_out_dir);
            for (const auto & output : result.named_audio_outputs) {
                const auto path = *audio_out_dir / (output.id + ".wav");
                write_wav_output(path, engine::audio::AudioBuffer{
                    output.audio.sample_rate,
                    output.audio.channels,
                    output.audio.samples,
                });
                std::cout << "audio_out[" << output.id << "]=" << path.string() << "\n";
            }
        } else {
            std::cout << "audio_outputs=" << result.named_audio_outputs.size() << "\n";
            for (const auto & output : result.named_audio_outputs) {
                std::cout << "audio_output_id=" << output.id
                          << " sample_rate=" << output.audio.sample_rate
                          << " channels=" << output.audio.channels
                          << " samples=" << output.audio.samples.size()
                          << "\n";
            }