- Add new fields to AppConfig type and buildAppConfig factory
- Update FE-PAGE-ADMIN-018: heading changed to "Authentication Methods"
- Update FE-PAGE-ADMIN-053: oidc_only toggle removed from OIDC panel
- Update FE-PAGE-LOGIN-007/017: mocks now include password_login/oidc_login
- Update ADMIN-SVC-049: updateOidcSettings no longer writes oidc_only
Adds new and expanded test suites across client and server to cover the
OAuth 2.1 scope system, MCP session manager, collab service, unified
memories helpers, OIDC service, budget slice, and OAuth authorize page.
Also extends SonarQube coverage exclusions to include bootstrapping files
(migrations, scheduler, main.tsx, types.ts) that are not meaningfully
testable.