Add type(activated/discovered) column to device list table

Add an type column to the device list table in the web UI to give operators an at-a-glance view of whether each device is activated or discovered, without needing to open individual device details.

sample UI:

<img width="1062" height="193" alt="Image" src="https://github.com/user-attachments/assets/3897e74a-147f-47a3-9e43-d96992e281d7" />