Bug: 复制表结构的时候，把id自增的约束没有复制到新表

[ChenYichener]

Chat2DB Version

v3.0.0

Describe the bug

我是用表复制功能，但是新表没有将原始表的自增约束给带上，丢失了

[openai0229]

Thanks for reporting this. Chat2DB Community 5.3.x is a major new baseline rather than a patch on the historical release line. The database client core, local storage, packaging, and AI integrations have changed substantially, so this report against the previous architecture cannot be treated as a current 5.3.1 defect. We are closing this historical issue as outdated, not claiming that the exact symptom was individually fixed. For Community, please back up existing data and test with a fresh 5.3.1 installation because historical Community releases do not support an in-place upgrade. For Pro or Local, please test with the current corresponding edition. If the problem is still reproducible, open a new issue using the current template with the edition, OS, database version, steps, and logs.