Spring bean definition that ensures that client.name tags are included in HTTP client metrics again

HttpClientMetricsConfig.java

/**
 * Starting with Boot 3, the {@code client.name} tag is no longer included by default
 * in the {@code http.client.requests} metrics. Restore it by overriding
 * {@link DefaultClientRequestObservationConvention#getLowCardinalityKeyValues(ClientRequestObservationContext)}.
 *
 * @return {@link ClientRequestObservationConvention} that adds the {@code client.name} to the low cardinality key-values.
 */
@Bean
ClientRequestObservationConvention clientNameAddingObservationConvention() {
    return new DefaultClientRequestObservationConvention() {
        @Override
        public KeyValues getLowCardinalityKeyValues(ClientRequestObservationContext context) {
            return super.getLowCardinalityKeyValues(context).and(this.clientName(context));
        }
    };
}