Track creation/deletion events for server-side environment keys

### Is your feature request related to a problem?

There is no visibility of key creation/deletion events in the audit log currently.

### Describe the solution you'd like.

These events should be added to the audit log so that there is full visibility into which user, when then key was deleted and what environment this was deleted in.

### Describe alternatives you've considered

n/a

### Additional context

_No response_

定位伺服器端的環境金鑰建立和刪除處理常式，然後找到稽核記錄實作和現有的事件模式。追蹤執行操作的使用者、時間戳記和環境是如何記錄的；當金鑰生命週期的兩個事件都帶有這些詳細資訊出現在稽核記錄中，並且有相關測試涵蓋時，即視為完成。

由索引模型根據 Issue 內容生成。