Add ExternallyOwned() to RabbitMQ queues and exchanges (closes #3064)

[jeremydmiller]

Closes #3064. Brings the ExternallyOwned() escape hatch added for Kafka topics (#3062) to the RabbitMQ transport, for queues and exchanges owned by another system where the connecting identity lacks configure/delete permissions.

Behavior

When a queue or exchange is marked ExternallyOwned(), Wolverine will:

• never declare it at startup, even with AutoProvision() enabled
• never delete it during a resources teardown
• skip setting up or tearing down its bindings

API

ExternallyOwned() is available on:

• RabbitMqListenerConfiguration — opts.ListenToRabbitQueue("q").ExternallyOwned()
• RabbitMqSubscriberConfiguration — opts.PublishMessage<T>().ToRabbitQueue("q").ExternallyOwned() / .ToRabbitExchange("ex").ExternallyOwned()
• RabbitMqExchangeConfiguration

…and as an IsExternallyOwned setter on RabbitMqExchangeConfigurationExpression, alongside the existing DeclarePassive setter.

opts.UseRabbitMq().AutoProvision();

opts.ListenToRabbitQueue("shared-orders").ExternallyOwned();
opts.PublishMessage<OrderPlaced>().ToRabbitExchange("shared-events").ExternallyOwned();

Included fix: DeclarePassive teardown asymmetry

A DeclarePassive exchange only makes a passive declaration at startup (verify-existence, never create). It was still being deleted on teardown, which is asymmetric — Wolverine would destroy a resource it deliberately never created. It is now left alone on teardown as well. (ExternallyOwned and DeclarePassive remain distinct flags: passive still touches the broker to verify existence; externally-owned never touches it at all.)

Tests

New externally_owned_rabbit_topology_is_skipped (6 facts, broker-side passive-declare existence checks):

• queue / exchange are not created at startup under AutoProvision()
• owned topology is still created alongside externally-owned (discriminator)
• teardown leaves an externally-owned listener queue, exchange, and a DeclarePassive exchange alone

All 6 pass against the local broker; 52 related existing RabbitMQ tests stay green. wolverine.slnx -c Release builds clean (0 warnings, 0 errors).

Docs

New "Externally-Owned Queues and Exchanges" section in the RabbitMQ object-management guide, including the DeclarePassive distinction note.

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