Inline HasTransportConsumerFinalizer into TransportURL controller

Move the transport consumer finalizer check from the exported API
helper into a private function in the controller — the only consumer.
Delete transporturl_helpers.go entirely since all exported helpers are
now either in lib-common (ManageSecretConsumerFinalizer,
RemoveSecretConsumerFinalizer) or inlined here.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: lmiccini

apis/rabbitmq/v1beta1/transporturl_helpers.go

@@ -629,7 +629,7 @@ func (r *TransportURLReconciler) reconcileNormal(ctx context.Context, instance *
 		if err != nil && !k8s_errors.IsNotFound(err) {
 			return ctrl.Result{}, err
 		}
-		if err == nil && rabbitmqv1.HasTransportConsumerFinalizer(oldSecret) {
+		if err == nil && hasTransportConsumerFinalizer(oldSecret) {
 			Log.Info("Waiting for consumer to release previous transport secret",
 				"secret", instance.Status.PreviousSecretName)
 			return ctrl.Result{RequeueAfter: PendingReleaseCheckInterval}, nil
@@ -1058,7 +1058,7 @@ func (r *TransportURLReconciler) tryReleasePendingUser(ctx context.Context, inst
 		if err != nil && !k8s_errors.IsNotFound(err) {
 			return false, err
 		}
-		if err == nil && rabbitmqv1.HasTransportConsumerFinalizer(oldSecret) {
+		if err == nil && hasTransportConsumerFinalizer(oldSecret) {
 			Log.Info("Waiting for consumer to release old transport secret",
 				"secret", instance.Status.PreviousSecretName,
 				"pendingUser", pendingRef)
@@ -1309,6 +1309,16 @@ func (r *TransportURLReconciler) deleteLegacyOwnedResources(ctx context.Context,
 	return nil
 }
 
+func hasTransportConsumerFinalizer(secret *corev1.Secret) bool {
+	for _, f := range secret.Finalizers {
+		if strings.HasSuffix(f, rabbitmqv1.TransportSecretConsumerSuffix) &&
+			strings.HasPrefix(f, "openstack.org/") {
+			return true
+		}
+	}
+	return false
+}
+
 // GetRabbitmqCluster - get RabbitMq object in namespace
 func getRabbitmqCluster(
 	ctx context.Context,