Return the OIDC id_token in the callback response so the frontend can
store it and pass it as id_token_hint to the provider's end-session
endpoint on logout. This lets Authentik (or any OIDC provider) honor
the post_logout_redirect_uri and redirect back to the Cameleer login
page instead of showing the provider's own logout page.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>