headless login으로 리펙토링

backend/internal/handler/auth_handler.go

@@ -1728,7 +1728,7 @@ func (h *AuthHandler) loadHeadlessJWKS(ctx context.Context, client domain.HydraC
 		}
 		raw = body
 	default:
-		return nil, fmt.Errorf("trusted rp public key is not configured")
+		return nil, fmt.Errorf("headless login public key is not configured")
 	}
 
 	var keySet jose.JSONWebKeySet
@@ -1736,7 +1736,7 @@ func (h *AuthHandler) loadHeadlessJWKS(ctx context.Context, client domain.HydraC
 		return nil, fmt.Errorf("failed to decode jwks: %w", err)
 	}
 	if len(keySet.Keys) == 0 {
-		return nil, fmt.Errorf("trusted rp jwks has no keys")
+		return nil, fmt.Errorf("headless login jwks has no keys")
 	}
 	return &keySet, nil
 }