Combined channel for outbox: DB -> distributed publisher

[lifinsky]

Description
Sending a command to another microservice should also be guaranteed through the outbox pattern. It is currently not possible to combine these channels through a combined channel. Currently there are 3 stages: db consumer -> async (internal consumer) -> publisher (new message to distributed bus exchange).

Example Service configuration for async outbox

    #[ServiceContext]
    public function enableRabbitMq(): AmqpBackedMessageChannelBuilder
    {
        return AmqpBackedMessageChannelBuilder::create('internal');
    }

    #[ServiceContext]
    public function databaseChannel(): DbalBackedMessageChannelBuilder
    {
        return DbalBackedMessageChannelBuilder::create('db');
    }

    #[ServiceContext]
    public function combinedMessageChannel(): CombinedMessageChannel
    {
        return CombinedMessageChannel::create(
            'outbox',
            ['db', 'internal'],
        );
    }

Distributed bus publisher:

    #[EventHandler(endpointId: 'order.changed')]
    #[Asynchronous('outbox')]
    public function changeBillingDetails(OrderChanged $event, DistributedBus $distributedBus): void
    {
        $distributedBus->sendCommand(
            'billing',
            'billing.changeDetails',
            '["personId":"123","billingDetails":"01111"]',
            'application/json',
        );
    }

Is it possible to make sending a command to a db channel with automatic sending to the distributed channel (combined channel between db and distributed), skipping sending OrderChanged to async internal channel? For example:

$distributedBus->sendCommand(
  'billing_outbox', // combined channel db -> distributed publisher channel to billing service using Ecotone service configuration
  'billing.changeDetails',
  '["personId":"123","billingDetails":"01111"]',
  'application/json',
);