只新增可空 created_by(索引)与非空默认空串的 created_source,不回填历史行; 迁移按列/索引存在性守卫,可重复执行。 Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01NTDbDcwbDw1TSAcE6wfh2F
只新增可空 created_by(索引)与非空默认空串的 created_source,不回填历史行; 迁移按列/索引存在性守卫,可重复执行。 Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01NTDbDcwbDw1TSAcE6wfh2F