HAVING MAX/MIN parsing broken

HAVING MAX/MIN parsing broken: a task in harbor-swesmith-rl-artifacts: Harbor SWE-Smith 强化学习数据产物 (Harbor dataset). When parsing SQL with HAVING MAX or HAVING MIN clauses, the parser incorrectly returns early without processing the HAVING clause, causing the query to be parsed incorrectly.

The task

When parsing SQL with `HAVING MAX` or `HAVING MIN` clauses, the parser incorrectly returns early without processing the HAVING clause, causing the query to be parsed incorrectly.

Part of keryszhan/harbor-swesmith-rl-artifacts.