test

                    if (degraded_) {

                        std::cerr << "Cluster: recovered — all "

                                  << health.nodes_online << "/" << n

                                  << " nodes online, starting scrub" << std::endl;

                                  << " nodes online";

                        recovery_epoch_.fetch_add(1);

                        // Auto-scrub after recovery to rebalance shards

                        // Auto-scrub after recovery — but only when domain

                        // backends are loaded, otherwise scrub would treat

                        // all domain groups as orphaned and delete them.

                        if (domains_ready_.load()) {

                            std::cerr << ", starting scrub" << std::endl;

                            std::thread([this](){

                                try { scrub(); } catch (...) {}

                            }).detach();

                        } else {

                            std::cerr << " (scrub deferred — domains not ready)" << std::endl;

                        }

                        healthy_cycles = 0;

                    }

                    degraded_ = false;