fix(driver-sql): refuse and roll back a MySQL upsert that merges onto a row the caller never identified (#8807) - #8940

fix(driver-sql): refuse and roll back a MySQL upsert that merges onto a row the caller never identified (#8807)#8940

hotlong merged 8 commits into

mainobjectstack-ai/objectstack:mainfrom

claude/issue-8807-upsert-unnamed-unique-key-mergeobjectstack-ai/objectstack:claude/issue-8807-upsert-unnamed-unique-key-mergeCopy head branch name to clipboard