[Issue] Github connector in pending state

Issue Description
Repository added to knowledge is in pending state, and has been like that for weeks. Github connector is stuck in "connecting". Using the same credentials with Github MCP works fine

<img width="836" height="474" alt="Image" src="https://github.com/user-attachments/assets/7d89ce97-b5e4-464d-9d0d-380a5357f994" />