Directorship attendance autofill should only include activated accounts

Currently, when you go to submit directorship attendance, it pulls a list of all frosh and accounts in the "active" group. However, this includes disabled accounts. A filter should be added to remove disabled accounts.

首先定位 directorship 的出席提交流程，以及从活动组构建其自动填充列表的查询。确认账户的激活或禁用状态是如何表示的，然后验证已禁用的账户会被排除，而已激活的 frosh 和账户仍会被包含。

由索引模型根据 Issue 内容生成。