Symfony 7.4 Messenger component reference for async message processing and queuing. Use when creating, configuring, or debugging message handlers, message buses, transports, middleware, or any async/queue-related Symfony code. Triggers on: Messenger, message bus, handlers, transports, AMQP, RabbitMQ, async processing, middleware, envelope, stamps, #[AsMessageHandler], MessageHandlerInterface, MessageBusInterface, RoutableMessageBus, messenger:consume, queues, workers, retry strategy, failure transport, DelayStamp, TransportNamesStamp.