explicit SpectatordRegistry()

in spectator/registry.h [337:343]


  explicit SpectatordRegistry(const Config& config, logger_ptr logger)
      : base_registry<stateless<stateless_types<SpectatordPublisher>>>(
            std::move(logger)) {
    extra_tags_ = Tags::from(config.common_tags);
    state_.publisher =
        std::make_unique<SpectatordPublisher>(config.endpoint, config.bytes_to_buffer, logger_);
  }