refactor: rename idp fields to provider naming

backend/app/security/admin_guard.py

@@ -1,7 +1,7 @@
 from fastapi import Depends, HTTPException, status
 
 from app.core.config import get_settings
-from app.schemas.auth import KeycloakPrincipal
+from app.schemas.auth import ProviderPrincipal
 from app.security.idp_jwt import require_authenticated_principal
 
 
@@ -21,8 +21,8 @@ def _expand_group_aliases(groups: set[str]) -> set[str]:
 
 
 def require_admin_principal(
-    principal: KeycloakPrincipal = Depends(require_authenticated_principal),
-) -> KeycloakPrincipal:
+    principal: ProviderPrincipal = Depends(require_authenticated_principal),
+) -> ProviderPrincipal:
     settings = get_settings()
     required_groups = _expand_group_aliases(set(settings.admin_required_groups))