private static ObjectMapper createObjectMapper() {
        ObjectMapper mapper = Jackson.createMapper();
        SimpleModule module = new SimpleModule("DoubleSerializer",
                                               new Version(1, 0, 0, "", null, null));
        module.addSerializer(Double.class, new DoubleSerializer());
        mapper.registerModule(module);
        return mapper;
    }
Returns an object mapper with a custom floating point serializer to avoid scientific notation
metrics-proxy/src/main/java/ai/vespa/metricsproxy/metric/model/json/JacksonUtil.java