OPENNLP-1818: Update zlibsvm-core to 3.0.0

[dependabot]

Bumps de.hs-heilbronn.mi:zlibsvm-core from 2.1.2 to 3.0.0.

Release notes

Sourced from de.hs-heilbronn.mi:zlibsvm-core's releases.

zlibsvm-3.0.0

Changelog

3.0.0

Breaking Changes

• Java 21 required — Minimum Java version raised from 17 to 21.
• SvmTrainer.train() now returns Optional<SvmModel> — Previously returned null when cross-validation mode was enabled. Callers must update from model = trainer.train(docs) to model = trainer.train(docs).orElseThrow() (or handle the empty case).
• SvmMetaInformation is now immutable — All 8 setter methods (setSvmConfiguration, setNumberOfClasses, setAmountOfSupportVectors, setRhoConstants, setLabelForEachClass, setProbabilityA, setProbabilityB, setNumberOfSupportVectorsForEachClass) have been removed from the interface and implementation. These were unused across the codebase.
• NativeSvmModelWrapper multi-arg constructors replaced by Builder — The 9- and 11-parameter constructors have been replaced with a fluent NativeSvmModelWrapper.Builder. The canonical NativeSvmModelWrapper(svm_model) constructor is unchanged.
• Assertions replaced with IllegalArgumentException — All assert statements in public API methods now throw IllegalArgumentException with descriptive messages. Code catching AssertionError from zlibsvm must catch IllegalArgumentException instead.

New Features

• SvmDocumentImpl — A ready-to-use SvmDocument implementation is now provided in zlibsvm-core, eliminating the need for users to write their own.
• Cross-validation test coverage — New tests verify that cross-validation mode returns an empty Optional and produces meaningful accuracy values across different fold counts.

Bug Fixes

• SvmTrainingTestCase: copy-paste errors — Test was comparing getRhoConstants() three times instead of validating getProbabilityA() and getProbabilityB(). A separate assertion was comparing a model's config to itself instead of the reference model.
• SvmModelImpl: incomplete config reconstruction — When loading models from native LIBSVM, only 6 of 16 configuration fields were reconstructed. Added SvmConfigurationImpl.fromNativeParameter() factory to capture all fields.
• PrimitiveHelper: array index safety — Map-to-array conversions used HashMap keys directly as array indices, risking ArrayIndexOutOfBoundsException with non-sequential keys. Now uses sorted iteration.
• SvmConfigurationImpl: mutable state exposure — getWeight() and getWeightLabel() returned mutable lists, allowing callers to corrupt the immutable configuration. Now wrapped in Collections.unmodifiableList().
• SvmPerformanceTestCase: MODE_NAME typo renamed to MODEL_NAME; @BeforeEach changed to @BeforeAll so the reference benchmark runs once per class instead of before every test.

Improvements

• Migrated to JUnit 5 (Jupiter) from JUnit 4.
• Comprehensive JavaDoc added across all public API interfaces, enums, and core implementations.
• README reworked — Fixed broken code formatting in the prediction example, added Requirements section, improved structure.

Dependency Updates

• JUnit: 4.13.2 → 5.12.1
• maven-surefire-plugin: 3.5.4 → 3.5.5
• maven-compiler-plugin updated
• log4j-slf4j2-impl: 2.25.1 → 2.25.3
• maven-javadoc-plugin: 3.11.3 → 3.12.0
• maven-source-plugin: 3.3.1 → 3.4.0
• forbiddenapis: 3.9 → 3.10
• license-maven-plugin: 2.6.0 → 2.7.1
• versions-maven-plugin: 2.19.0 → 2.21.0
• central-publishing-maven-plugin updated
• actions/checkout: 5.0.0 → 6.0.2
• actions/setup-java: 5.0.0 → 5.2.0

Commits

• 27b9fbc Release 3.0.0
• 267ac06 Bump to 3.0.0-SNAPSHOT, require Java 21
• b546348 Add test coverage for cross-validation training path
• dc767ec Return Optional<SvmModel> from train() instead of null for CV mode
• 37a701f Refactor NativeSvmModelWrapper to use Builder pattern
• 75f5f03 Make SvmMetaInformation immutable by removing unused setters
• 9bf9859 Replace test mocks with SvmDocumentImpl in core domain
• 90f8d0a Replace assert statements with IllegalArgumentException checks
• fbf56f7 Fix mutable state exposure and broken Comparable contract
• a0e7608 Add *.model to .gitignore for generated test artifacts
• Additional commits viewable in compare view

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