[6262] Switch to Spring Boot 4

[mcharfadi]

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[mcharfadi]

I'll organize the PR in several commits when it's building.

[mcharfadi]

Here the most impacting changes :

• Replace com.fasterxml import package to tools.jackson

• Change the parameter of ICustomNodeStyleDeserializer and IRepresentationDeserializer handle method from
  INodeStyle handle(ObjectMapper mapper, String root) throws JsonProcessingException; to
  INodeStyle handle(ObjectNode root, JsonParser jsonParser, DeserializationContext context) throws JacksonException;
Optional<IRepresentation> handle(JsonParser jsonParser, DeserializationContext context, ObjectNode root);

• JsonProcessingException is replaced by JacksonException

• The method used to parse JSON have been updated accordingly to the Jackson migration guide.

• MapperFeature.SORT_PROPERTIES_ALPHABETICALLY & DeserializationFeature.FAIL_ON_NULL_FOR_PRIMITIVES have been disabled (as it were in Jackson 2) see ObjectMapperConfiguration

• jackson-datatype-jsr310 has been remove since it's included with Jackson3

• JacksonMappingProvider in tests has been removed since it's not compatible with Jackson 3

• Rest Controllers have been updated to not pass explicitly null to the body of the ResponseEntity.

• EObjectJsonSerializer has been updated and is now configured thanks to TestsConfigMapper instead of RestResponseSerializationCustomizer

• org.springframework.boot.test.web.client.TestRestTemplate has been replaced by org.springframework.web.client.RestTemplate

• StartMessage is now a record, as this class was not serializing correctly with Jackson3

• "sirius-components-charts", code coverage was set to 84.0 because the constructor of Hierarchy was not called by Jackson during the tests.

Feel free to squash the commits into one

[pcdavid]

Note that 4.0.5 has just been released: https://spring.io/blog/2026/03/26/spring-boot-4-0-5-available-now

[pcdavid]

Mention the exact version number.

[sbegaudeau]

We can't upgrade to liquibase 5.x

[sbegaudeau]

Imports need to be re-ordered