…ckerPostgres.kt

- Update dependencies to tools.jackson.*
- Rename imports from com.fasterxml.jackson to tools.jackson
- Fix usage of immutable ObjectMapper (JsonMapper builder)
- Rename TextNode to StringNode
- Rename JsonSerializer/JsonDeserializer to ValueSerializer/ValueDeserializer
- Update SerializerProvider to SerializationContext in serialize methods

Investigated usage and confirmed jackson-dataformat-yaml is only used in tests (SwaggerUiTest). Moved it from implementation to testImplementation to reduce production dependencies.

…ncies

- Migrated Jackson from com.fasterxml.jackson to tools.jackson group (Jackson 3).
- Moved jackson-dataformat-yaml, io.minio:minio, and org.tukaani:xz to testImplementation as they are not used in production code.
- Restored explicit version for commons-compress.
- Updated gradle.lockfile and formatted code via ktlint.

…ant properties

- Replace custom ObjectMapper bean with JsonMapperBuilderCustomizer in BackendSpringConfig.
- Remove redundant Jackson and bean overriding properties from test application.properties.
- Cleanup SQL_FILE appender in logback-test.xml.

- Consolidate ObjectMapper configurations across production, tests, and database JSONB serialization to ensure consistent behavior (disabled FAIL_ON_UNKNOWN_PROPERTIES and FAIL_ON_NULL_FOR_PRIMITIVES).
- Remove redundant @JsonIgnoreProperties annotations from configuration classes now that global defaults handle them.
- Add TODO(#5754) to document the double-encoding hack in ReleasedDataModel required by the current website consumer.
- Fix regression in BackendApplication where the wrong class name was used for Exposed auto-configuration exclusion, which broke the test suite.
- Update test clients (FilesClient, GetReleasedDataFileSharingEndpointTest) to use the centralized jacksonObjectMapper property instead of creating fresh instances.