Trace back everything (tested)

Signed-off-by: Asai Neko <sugar@sne.moe>

data/drivers/meilisearch.go

@@ -1,14 +1,23 @@
 package drivers
 
 import (
+	"fmt"
 	"net/http"
 
 	"github.com/meilisearch/meilisearch-go"
+	"github.com/spf13/viper"
 	"go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp"
 )
 
 func MeiliSearch(dsn MeiliDSN) meilisearch.ServiceManager {
-	otelTransport := otelhttp.NewTransport(http.DefaultTransport)
+	serviceName := viper.GetString("search.service_name")
+
+	otelTransport := otelhttp.NewTransport(
+		http.DefaultTransport,
+		otelhttp.WithSpanNameFormatter(func(operation string, r *http.Request) string {
+			return fmt.Sprintf("%s %s", serviceName, r.Method)
+		}),
+	)
 
 	httpClient := &http.Client{
 		Transport: otelTransport,