fix: disable /loaduser

[carlosthe19916]

Fixes: https://redhat.atlassian.net/browse/TC-3623

loadUserInfo=true forces the endpoint /loaduser to be fetched and due to internals of the library the whole oidc flow fails in case /loaduser fails.

In Keycloak it is not needed to call /loaduser because the username is part of the /token response already so there is no harm on disabling it for be benefit of making it work in Azure

Summary by Sourcery

Bug Fixes:

• Prevent OIDC login failures when the /loaduser endpoint is unavailable by disabling automatic user info loading.

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

Disables the OIDC client’s /loaduser call by setting loadUserInfo to false in the client configuration, relying on user information from the token response instead to prevent flow failures when /loaduser is unavailable (e.g., in Azure).

Sequence diagram for OIDC login flow with loadUserInfo disabled

sequenceDiagram
    actor User
    participant WebApp
    participant OIDCProvider

    User->>WebApp: Initiate login
    WebApp->>OIDCProvider: Authorization request (response_type=code)
    OIDCProvider-->>WebApp: Authorization code
    WebApp->>OIDCProvider: Token request (code)
    OIDCProvider-->>WebApp: Token response (includes user info)

    alt loadUserInfo_true (previous behavior)
        WebApp->>OIDCProvider: GET /loaduser
        alt loaduser_success
            OIDCProvider-->>WebApp: User profile
            WebApp-->>User: Authenticated session established
        else loaduser_failure
            OIDCProvider-->>WebApp: Error
            WebApp-->>User: OIDC flow fails
        end
    else loadUserInfo_false (current behavior)
        Note right of WebApp: /loaduser is not called
        WebApp-->>User: Authenticated session established using token user info
    end

Loading

File-Level Changes

Change	Details	Files
Disable the OIDC client’s user info loading to avoid reliance on the /loaduser endpoint.	Updated OIDC client settings to set loadUserInfo to false instead of true, preventing the automatic /loaduser request and relying on data already present in the token response	client/src/app/oidc.ts

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[sourcery-ai]

Hey - I've left some high level feedback:

• Consider adding a brief code comment next to loadUserInfo: false explaining the Azure/Keycloak rationale so future maintainers understand why this deviates from the library’s default behavior.
• If other OIDC providers may still require /loaduser, you might want to make loadUserInfo configurable (e.g., via ENV) rather than hard-coding it to false to avoid regressions for non-Keycloak setups.

Prompt for AI Agents

Please address the comments from this code review:

## Overall Comments
- Consider adding a brief code comment next to `loadUserInfo: false` explaining the Azure/Keycloak rationale so future maintainers understand why this deviates from the library’s default behavior.
- If other OIDC providers may still require `/loaduser`, you might want to make `loadUserInfo` configurable (e.g., via ENV) rather than hard-coding it to `false` to avoid regressions for non-Keycloak setups.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 66.50%. Comparing base (a676b36) to head (9db8925).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #975   +/-   ##
=======================================
  Coverage   66.50%   66.50%           
=======================================
  Files         218      218           
  Lines        3828     3828           
  Branches      873      873           
=======================================
  Hits         2546     2546           
  Misses        948      948           
  Partials      334      334           

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