[Bug] skill如果pytho脚本有pymysql会报找不到依赖

[truthsun22]

Contact Information

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MaxKB Version

v2.10.0-lts

Problem Description

我看dockerfile里已经设置允许用pymysql依赖了，但是如果skill包含python脚本中有import pymysql，会报找不到依赖。SandboxShellBackend类中，一开始会把python环境路径放到PATH中，但是在execute却又清空了PATH。这导致skill执行python脚本时无法找到/opt/maxkb-app/sandbox/python-packages

Steps to Reproduce

随便写一个skill，里面的python脚本只要import pymysql就行

The expected correct result

No response

Related log output

Additional Information

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