ThreadPool: Only notify_all when run_cnt is zero (atomic decrement-and-compare)

                task->get_future().get();

                // Update the run count and propagate update

                std::unique_lock<std::mutex> lock{run_mutex_};

                --run_cnt_;

                if(--run_cnt_ == 0) {

                    run_condition_.notify_all();

                }

            }

        }

        // Execute the cleanup function at the end of run

        if(finalize_function) {