Make sure we can work with FIFO

[Nyholm]

You can configure messenger like:

        transports:
            workqueue:
              dsn: '%env(WORKQUEUE_DSN)%'
              options: { message_group_id: foobar }

You also need to enable Content-Based Deduplication on your (SQS) queue option.

[mnapoli]

Thanks, could you write up a bit of documentation? I don't know what how to use FIFO with SQS.