Function require_assets

src/models/stable_audio/session.cpp:20–25

using Clock = std::chrono::steady_clock;

std::shared_ptr<const StableAudioAssets> require_assets(std::shared_ptr<const StableAudioAssets> assets) {
    if (assets == nullptr) {
        throw std::runtime_error("Stable Audio session requires assets");
    }
    return assets;
}

void validate_weight_storage(engine::assets::TensorStorageType storage_type, const char * option_name) {
    if (storage_type == engine::assets::TensorStorageType::Native ||