Return last active timestamp in addition to active status

I’m not sure if the Pod API already returns this info, but I guess not. What I’m sure of however is that `mod_http_admin_api` returns this data so we could easily forward it to the Dashboard.

<img width="407" height="698" alt="Image" src="https://github.com/user-attachments/assets/577a5696-2982-4a95-8c16-cb587896ba1b" />
