Micronaut 4 documentation misses @SerdeImport/@Serdeable.Deserializable annotations

Expected Behavior

Micronaut 4 Upgrade guide and Micronaut Validation documentation should contain information about @SerdeImport/@Serdeable.Deserializable annotations as they're required for validation and were absent in Micronaut 3.

Actual Behaviour

Hi

We tried to migrate from Micronaut 3 to Micronaut 4 and found that migration guide (https://micronaut.io/2023/05/09/upgrade-to-micronaut-framework-4-0-0/) contains no information about new @SerdeImport/@Serdeable.Deserializable annotations.

So previously we used this class to mark our DTO as introspected beans (they're in another module):

@Introspected(classes = Product.class)
public class BeanValidationConfiguration {
}

However after upgrade we received an exception in our tests:

Caused by: io.micronaut.http.codec.CodecException: Error encoding object [com.example.Product@6971bc23] to JSON: No serializable introspection present for type Product. Consider adding Serdeable. Serializable annotate to type Product. Alternatively if you are not in control of the project's source code, you can use @SerdeImport(Product.class) to enable serialization of this type.

The exception message is correct but it's not absolutely correct. @Serializable is meta-information and contains @Introspected annotation so we can put only @Serializable on the Product class.
But @SerdeImport doesn't contain @Introspected so we should use both here:

@SerdeImport(Product.class)
@Introspected(classes = Product.class)
public class BeanValidationConfiguration {
}

I guess this is important point however Micronaut Validation documentation(https://micronaut-projects.github.io/micronaut-validation/snapshot/guide/) doesn't contain anything about @SerdeImport and @Deserializable.

Steps To Reproduce

No response

Environment Information

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Example Application

No response

Version

4.1.4

Start with the Micronaut 4 upgrade guide and Micronaut Validation guide linked in the issue, and check how their existing migration and validation sections describe introspection. Document @SerdeImport and @Serdeable.Deserializable, including when @Introspected is also needed, then verify both guides explain the migration clearly.