fix(roll_call): 清除缓存以确保下次抽取读取最新记录

[WSXYT]

之所以提交pr是因为你说不负责的地方不能随便改(顺手修bug）：（（（（（（
This pull request improves the reliability of student selection in the roll call utility by ensuring that the internal cache of drawn records is cleared whenever records are reset or updated. This guarantees that subsequent draws always use the most up-to-date data.

Cache management improvements:

• In reset_drawn_records, after resetting the record, the method now deletes the corresponding entry from RollCallUtils._drawn_record_cache to ensure fresh data is used for future draws.
• In record_drawn_students, after recording selected students, the method also deletes the relevant cache entry to maintain consistency with the latest drawn records.

[Copilot]

Pull request overview

This pull request addresses a cache invalidation bug in the roll call utility by ensuring that the internal cache of drawn records is properly cleared when records are reset or updated. This prevents the system from using stale cached data after record modifications.

Changes:

• Added cache invalidation in reset_drawn_records to clear cached drawn records after reset operations
• Added cache invalidation in record_drawn_students to clear cached drawn records after recording new draws

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[WSXYT]

（其实是因为太困了脑子不太清醒（也许不用提交（算了真得睡了（要不然完蛋了（qwq

[lzy98276]

因为该PR不符合我的开发计划，以及优化代码时会包括这个部分，所以将关闭此PR