Added _total suffix to OTEL counter metrics.

internal/metrics/otelmetrics/factory.go

@@ -32,7 +32,7 @@
 }
 
 func (f *otelFactory) Counter(opts metrics.Options) metrics.Counter {
-	name := f.subScope(opts.Name)
+	name := counterNamingConvention(f.subScope(opts.Name))
 	counter, err := f.meter.Int64Counter(name)
 	if err != nil {
 		log.Printf("Error creating OTEL counter: %v", err)
@@ -131,3 +131,10 @@
 	}
 	return metric.WithAttributes(attributes...)
 }
+
+func counterNamingConvention(name string) string {
+	if !strings.HasSuffix(name, "_total") {
+		name += "_total"
+	}
+	return name
+}