[FEATURE]时间日期相关SQL生成

[armored-glitch]

SQLBot version

Please describe your requirements or suggestions for improvement
尊敬的SQLBot 团队：
对于一些时间日期的计算
例如：
SELECT "首课日期" AS "first_class_date",
"流失日期" AS "churn_date",
("流失日期" - "首课日期") AS "duration"
FROM "public"."REPORT0_e250913af2"
WHERE "首课日期" IS NOT NULL
AND "流失日期" IS NOT NULL
ORDER BY "duration"
LIMIT 1000

报错
Traceback (most recent call last):
File "/opt/sqlbot/app/apps/chat/task/llm.py", line 1050, in run_task
self.save_sql_data(data_obj=result)
TypeError: Type is not JSON serializable: datetime.timedelta

这一类问题会出现报错，似乎是JSON 序列话的问题，类似的问题是可以通过提示词 或自定义SQL 解决，除此之外还有其他的办法嘛

[yayanpei-fit2cloud]

感谢您的反馈，用的是什么模型？是希望模型计算出两个日期的差值？