-- 资源池 KOC 默认加入合作方：released_account_id 记录运营显式解绑/被顶替的资源账号，
-- 自动同步 ensurePartnersForPoolAccounts 不再为这些账号回填默认合作方
ALTER TABLE `partners` ADD COLUMN `released_account_id` VARCHAR(64) NOT NULL DEFAULT '' AFTER account_id;
-- statement-breakpoint
ALTER TABLE `partners` ADD INDEX `partners_released_account_idx` (`released_account_id`);