chore(coderd/provisionerdserver): avoid fk error on invalid ai_task_sidebar_app_id#19253

johnstcn merged 5 commits intomaincoder/coder:mainfrom

cj/18776/workaround-sidebar-app-id-fkcoder/coder:cj/18776/workaround-sidebar-app-id-fkCopy head branch name to clipboard