ddl: add callback log (#6549)
ddl: add callback log (#6549)


ming-relax/tidb,kyle-wang/tidb,kyle-wang/tidb,kyle-wang/tidb,c4pt0r/tidb,kyle-wang/tidb,Nify/tidb,kyle-wang/tidb,cosmtrek/tidb,c4pt0r/tidb,Cofyc/tidb,c4pt0r/tidb,pingcap/tidb,pingcap/tidb,ngaut/tidb,wusphinx/tidb,tiancaiamao/tidb,wusphinx/tidb,CodeRushing/tidb,c4pt0r/tidb,pingcap/tidb,pingcap/tidb,ngaut/tidb,cosmtrek/tidb,c4pt0r/tidb,Nify/tidb,Cofyc/tidb,mccxj/tidb,ngaut/tidb,c4pt0r/tidb,tiancaiamao/tidb,EvilMcJerkface/tidb,qiuyesuifeng/tidb,ngaut/tidb,coocood/tidb,ming-relax/tidb,CodeRushing/tidb,mccxj/tidb,coocood/tidb,pingcap/tidb,XuHuaiyu/tidb,kyle-wang/tidb,qiuyesuifeng/tidb,ngaut/tidb,XuHuaiyu/tidb,EvilMcJerkface/tidb,ngaut/tidb,pingcap/tidb