fix: restore upstream api_contract_test and remove Sora fields

backend/internal/server/api_contract_test.go

@@ -208,6 +208,9 @@ func TestAPIContracts(t *testing.T) {
 						"allow_messages_dispatch": false,
 						"fallback_group_id": null,
 						"fallback_group_id_on_invalid_request": null,
+						"allow_messages_dispatch": false,
+						"require_oauth_only": false,
+						"require_privacy_set": false,
 						"created_at": "2025-01-02T03:04:05Z",
 						"updated_at": "2025-01-02T03:04:05Z"
 					}