fix: use exclusive transient queues for RabbitMQ 4.3+ compat

[emilri]

hey, ran into this when local broker hit 4.3, transientEventStreamListener consumers couldn't connect anymore.

what's happening

transientQueueDeclare declares queues with durable: false, autoDelete: true, exclusive: false. RabbitMQ 4.3.0 deprecated that combo (transient_nonexcl_queues) and now rejects it by default:

INTERNAL_ERROR - Feature transient_nonexcl_queues is deprecated.

so the connection just dies on startup.

the fix

flip exclusive: false → exclusive: true in transientQueueDeclare. that's it, one line.

       durable: false,
       autoDelete: true,
-      exclusive: false,
+      exclusive: true,
       expires: QUEUE_EXPIRATION,

why this is fine

• exclusive: true = queue tied to the declaring connection, dies when it closes. that's what a transient queue should be doing anyway
• fan-out still works since transientEventStreamListener already gives each consumer a unique queue name (serviceEventRandomQueueName), all bound to the same routing key. exclusive only restricts who consumes from a given queue, not the routing
• works on every broker version that supports AMQP 0-9-1 so 3.x and 4.0-4.2 keep working too

tests

• had to flip the matching assertion on lib/index.test.ts:472 (same exclusive: false → exclusive: true). all 32 pass, 100% coverage still
• also tested locally with 4 backend pods against rabbitmq 4.3.0, one published event lands in all 4 like before

refs

• https://www.rabbitmq.com/docs/queues
• Documentation clarification about transient_nonexcl_queues feature deprecation rabbitmq/rabbitmq-server#12972

[argoyle]

🎖️ 🙇🏻

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (6c62c67) to head (4b8af10).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
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  Coverage   100.00%   100.00%           
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  Files            5         5           
  Lines          488       488           
  Branches        56        56           
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  Hits           488       488           

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[peter-svensson]

Thanks for the contribution @emilri 🚀