Add default queue implementation

[Gsantomaggio]

Adds a “default queue” specification to the RabbitMQ AMQP management client so callers can declare queues without explicitly setting x-queue-type, letting the server/vhost configuration decide the queue type.

Changes:

• Introduces DefaultQueueSpecification implementing IQueueSpecification without specifying a queue type argument.
• Updates topology recovery to map unknown/unspecified queue types to DefaultQueueSpecification.
• Adds an integration test for declaring a queue using DefaultQueueSpecification.

Fixes #83

[Copilot]

Pull request overview

Adds a “default queue” specification to the RabbitMQ AMQP management client so callers can declare queues without explicitly setting x-queue-type, letting the server/vhost configuration decide the queue type.

Changes:

• Introduces DefaultQueueSpecification implementing IQueueSpecification without specifying a queue type argument.
• Updates topology recovery to map unknown/unspecified queue types to DefaultQueueSpecification.
• Adds an integration test for declaring a queue using DefaultQueueSpecification.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 4 comments.

File	Description
pkg/rabbitmqamqp/entities.go	Adds DefaultQueueSpecification and expands IQueueSpecification documentation.
pkg/rabbitmqamqp/amqp_queue_test.go	Adds a test that declares a queue using DefaultQueueSpecification.
pkg/rabbitmqamqp/amqp_connection_recovery.go	Adds a default branch to recover queues with an unspecified/unknown type using DefaultQueueSpecification.

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[Copilot]

In the new default branch, toIQueueSpecification dereferences q.autoDelete and q.exclusive, but queueRecoveryRecord.autoDelete/exclusive are only populated for Classic queues in AmqpManagement.DeclareQueue. For DefaultQueueSpecification records these pointers will be nil, causing a panic during topology recovery. Consider either storing autoDelete/exclusive for default queues as well, or handling nil pointers here (e.g., defaulting to false).

[Copilot]

This assertion makes the test environment-dependent: RabbitMQ can be configured per-vhost to default queue type to quorum instead of classic when no x-queue-type is provided. To avoid flakiness, assert that no explicit x-queue-type was set (or only assert the DLX args), rather than hard-coding Classic here.

Suggested change

	// the default value for queue type is classic
	Expect(queueInfo.Type()).To(Equal(Classic))
	// ensure no explicit queue type was set; actual default depends on broker configuration
	Expect(queueInfo.arguments).NotTo(HaveKey("x-queue-type"))

[Copilot]

The rest of this file uses the public accessor queueInfo.Arguments() for argument assertions; accessing the unexported field queueInfo.arguments directly makes the test more brittle to internal refactors. Prefer using Arguments() here for consistency and encapsulation.

Suggested change

	Expect(queueInfo.arguments["x-dead-letter-exchange"]).To(Equal("dead-letter-exchange"))
	Expect(queueInfo.arguments["x-dead-letter-routing-key"]).To(Equal("dead-letter-routing-key"))
	Expect(queueInfo.Arguments()["x-dead-letter-exchange"]).To(Equal("dead-letter-exchange"))
	Expect(queueInfo.Arguments()["x-dead-letter-routing-key"]).To(Equal("dead-letter-routing-key"))