text: ALTER TABLE `am_cluster`
      ADD COLUMN `master_flag` tinyint(1) DEFAULT 0 COMMENT 'Master 标记';
  
  alter table am_deploy_component
      add cluster_id varchar(32) default "" not null comment '集群 ID';
  
  create index idx_cluster_id
      on am_deploy_component (cluster_id);
  
  alter table am_deploy_component
      add stage_id varchar(32) default "" not null comment 'Stage ID';
  
  create index idx_stage_id
      on am_deploy_component (stage_id);