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，以及從活動群組建立其自動填入清單的查詢。確認帳戶的啟用或停用狀態是如何表示的，然後驗證已停用的帳戶會被排除，而已啟用的 frosh 和帳戶仍會被包含。

由索引模型根據 Issue 內容生成。