add the feature for observability

pkg/metrics/http.go

@@ -0,0 +1,24 @@
+package metrics
+
+import (
+	"net/http"
+
+	"go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp"
+)
+
+// HTTPMiddleware wraps an HTTP handler with OpenTelemetry instrumentation.
+func HTTPMiddleware(handler http.Handler, operation string) http.Handler {
+	if !IsEnabled() {
+		return handler
+	}
+
+	return otelhttp.NewHandler(
+		handler,
+		operation,
+	)
+}
+
+// HTTPHandler wraps an HTTP handler function with OpenTelemetry instrumentation.
+func HTTPHandler(handler http.HandlerFunc, operation string) http.Handler {
+	return HTTPMiddleware(handler, operation)
+}