fix(deploy): health_monitor Docker 适配与巡检第三轮修补

Docker 生产用 docker restart；读 .env.prod 端口与容器 Telegram；已归档跳过全量热同步。

Co-authored-by: Cursor <cursoragent@cursor.com>

deploy/install-nexus-fresh.sh

@@ -281,11 +281,23 @@ phase_post() {
     echo ""
 }
 
+warn_if_already_installed() {
+    local env_prod="${NEXUS_ROOT}/docker/.env.prod" cname
+    [[ -f "$env_prod" ]] || return 0
+    cname="$(docker ps --format '{{.Names}}' 2>/dev/null | grep -E 'nexus-prod-nexus|nexus-nexus-1' | head -1 || true)"
+    if [[ -n "$cname" ]] && docker exec "$cname" test -f /var/lib/nexus/.install_locked 2>/dev/null; then
+        warn "检测到已安装并锁定的 Nexus（将清除 nexus-state 卷内配置并重建）"
+        read -r -p "确认继续全新安装? [y/N]: " ok
+        [[ "$ok" == "y" || "$ok" == "Y" ]] || exit 0
+    fi
+}
+
 main() {
     banner
     if [[ "$SKIP_CLONE" == true && -d "${NEXUS_ROOT}/deploy" ]]; then
         install_root_commands
     fi
+    warn_if_already_installed
     phase_preflight
     phase_1panel
     phase_packages