[CoR] ENTRA_CLIENT_ID is deployed as a zero-value placeholder causing Tasks API authentication failure

[v-ruizh]

OS: Win11 x64
Build Version: 0.12.8-alpha.0
VS Code Version: Version: 1.137.0

Repro Steps:

1. Create and deploy a CoR project using the following prompt:
   a to-do list web app with a REST API, PostgreSQL database, Microsoft Entra authentication, and Azure deployment
2. Complete the workflow and deploy the application to Azure.
3. Open the deployed application.

Expect:
A valid Microsoft Entra client ID should be configured during deployment so the deployed application can authenticate successfully and access the Tasks API.

Actual:
The application loads, but the Tasks page shows:

Tasks could not be refreshed 
Microsoft Entra configuration is missing

More Info:

1. The generated Container App is configured with: ENTRA_CLIENT_ID=00000000-0000-0000-0000-000000000000
2. Backend logs show:

GET /api/tasks
401 Unauthorized

3. The deployment itself succeeds and the backend health endpoint reports healthy:

GET /api/health
200 OK

However, the application is not functional because requests to the protected Tasks API return 401 Unauthorized.