Create a RabbitMQ superstream (partitioned stream) and consume from it with balanced partition assignment

Steps

1. Enable the RabbitMQ Streams plugin: rabbitmq-plugins enable rabbitmq_stream rabbitmq_stream_management
2. Create a superstream using the management CLI or stream client: rabbitmq-streams add_super_stream orders --partitions 3 creates streams orders-0, orders-1, orders-2 and a routing exchange
3. Publish using a producer with routing key hashing: the superstream exchange routes each message to a partition based on a hash of the routing key, ensuring per-key ordering across partitions
4. On the consumer side, use the super-stream consumer API with a ConsumerGroup name set; the client library automatically distributes partition ownership across consumer group members
5. Configure x-stream-offset=first or x-stream-offset=next on each partition consumer to set the starting read position; use stored offsets for resumable consumption
6. Monitor partition consumer distribution via GET /api/stream/consumers and confirm each partition is assigned to exactly one active consumer