chore: move the go code into a subfolder

apps/api/internal/notification/channels/instrumenting/metrics.go

@@ -0,0 +1,31 @@
+package instrumenting
+
+import (
+	"context"
+
+	"github.com/zitadel/logging"
+	"go.opentelemetry.io/otel/attribute"
+
+	"github.com/zitadel/zitadel/internal/notification/channels"
+	"github.com/zitadel/zitadel/internal/telemetry/metrics"
+)
+
+func countMessages(ctx context.Context, channel channels.NotificationChannel, successMetricName, errorMetricName string) channels.NotificationChannel {
+	return channels.HandleMessageFunc(func(message channels.Message) error {
+		err := channel.HandleMessage(message)
+		metricName := successMetricName
+		if err != nil {
+			metricName = errorMetricName
+		}
+		addCount(ctx, metricName, message)
+		return err
+	})
+}
+
+func addCount(ctx context.Context, metricName string, message channels.Message) {
+	labels := map[string]attribute.Value{
+		"triggering_event_type": attribute.StringValue(string(message.GetTriggeringEventType())),
+	}
+	addCountErr := metrics.AddCount(ctx, metricName, 1, labels)
+	logging.WithFields("name", metricName, "labels", labels).OnError(addCountErr).Error("incrementing counter metric failed")
+}