Migrate Jackson properties for Spring Boot 4#963
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When upgrading to Spring Boot 4, Jackson 3 moved date/time and enum feature enums to DateTimeFeature and EnumFeature respectively. Auto-migrate properties like spring.jackson.serialization.write-dates-as-timestamps to the new structure spring.jackson.datatype.datetime.write-dates-as-timestamps. Fixes #953
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Summary
Adds automatic migration of Jackson feature properties that moved to new enums in Jackson 3 / Spring Boot 4. Properties like
spring.jackson.serialization.write-dates-as-timestampsnow migrate tospring.jackson.datatype.datetime.write-dates-as-timestamps, and enum-related properties migrate to thespring.jackson.datatype.enum.*namespace.References
DateTimeFeature— new home for date/time featuresEnumFeature— new home for enum featuresSerializationFeature— no longer contains date/time or enum constantsDeserializationFeature— no longer contains date/time or enum constantsSerializationFeature— previously contained these featuresDeserializationFeature— previously contained these featuresTest plan
migrateJacksonDateTimePropertiestest covering datetime features in both .properties and .yml formatsmigrateJacksonEnumPropertiestest for enum-related migrations