Implement API required for Device DIscovery

Addresses - https://github.com/device-management-toolkit/console/issues/858

Implement below APIs to support Device Discovery feature

<img width="1010" height="496" alt="Image" src="https://github.com/user-attachments/assets/f8d0775d-c89c-4f50-a8f5-5e8c402198c0" />