Add default value for spring.data.web.pageable.serialization-mode to configuration metadata

[izeye]

See gh-39797

[wilkinsona]

This isn’t needed:

https://docs.spring.io/spring-boot/3.4/appendix/application-properties/index.html#application-properties.data.spring.data.web.pageable.serialization-mode

The annotation processor now collects default values from enum fields.

[izeye]

@wilkinsona Ah, sorry. I missed it.

So are the existing manual configuration metadata for enum default values not necessary, for example, spring.jackson.constructor-detector as follows?

spring-boot/spring-boot-project/spring-boot-autoconfigure/src/main/resources/META-INF/additional-spring-configuration-metadata.json

Lines 1614 to 1617 in c7c73be

	{
	"name": "spring.jackson.constructor-detector",
	"defaultValue": "default"
	},

[wilkinsona]

Many of the defaults were removed in 788417d as part of #7562. It's entirely possible that we missed some but that doesn't appear to be the case with spring.jackson.constructor-detector as the code has no default value:

spring-boot/spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/jackson/JacksonProperties.java

Lines 103 to 107 in d4df6f7

	/**
	* Strategy to use to auto-detect constructor, and in particular behavior with
	* single-argument constructors.
	*/
	private ConstructorDetectorStrategy constructorDetector;