}

    /**
     * Fetches new events from OpenSearch that were created after the last check time.
     *
     * @return the list of new events.
     */
    protected List<EventInfo> fetchNewEvents() {
        final List<EventInfo> events = new ArrayList<>();
        final String query = toJson(Map.of( //
                "query", Map.of("bool", Map.of( //
                        "must", List.of( //