[LouisDeconinck]

What this PR does:
Prevents YAML scalar type inference from replacing explicitly declared AsyncAPI property types before deserialization. This allows unquoted specification/API versions and numeric MQTT QoS values to be read through the document reader.

Adds a focused regression test covering asyncapi: 3.0.0, info.version: 1.0.0, and bindings.mqtt.qos: 2.

Fixes #76

Additional information:

• dotnet build --no-restore passes.
• Focused IO tests pass on net8.0 and net9.0.
• The full suite has container-dependent failures locally because Docker is unavailable; non-container tests pass.

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[cdavernas]

LGTM! Cheers ❤️

[cdavernas]

@LouisDeconinck Would you be so kind to fix the tests so that I can proceed with the merge?

[LouisDeconinck]

The build-and-test failure on the previous run was caused by flaky container-based binding tests (NatsBindingHandlerTests.Subscribe_Should_Work, AmqpBindingHandlerTests.Publish_Should_Work/Subscribe_Should_Work) — readiness/timing races in the Testcontainers setup, unrelated to the YAML scalar change (all IO tests, including the new one, passed on both target frameworks). The new commit waits for the broker port to be available before tests proceed, and gives the NATS subscription a moment to be established before publishing.

[cdavernas]

@LouisDeconinck Thank you ❤️

There's clearly still a bug with the tests (42mn+ to run) but I'll address in a dedicated PR