0.9 Release

Dependencies & Platform

• Update Java source/target to 17 for samples
• Update j2cl.platform.version to 20260527-1
• Update GWT to 2.13.0
• Remove unused top-level junit dependency

New Features

• Schema-first code generation — generate Jakarta JSON Binding marshallers from JSON Schema / YAML definitions (jsonschema-jsonb-generator module)
• @JsonbCreator — support for constructor and static factory-based deserialization
• @JSONMappers — annotation for generating marshallers for external types (type-level and package-level)
• @JsonbNillable — support at TYPE, FIELD, and PACKAGE levels for controlling null serialization

Bug Fixes

• Fix JsonSerializer subtype wrapper to use named variant in SerializerJsonbTypeSerializerWrapper
• Fix JsonbSubtypeSerializer — write @ type discriminator inline instead of mutating serializer properties; throw IllegalArgumentException instead of Error
• Fix ContextedJsonGenerator.writeStartArray() incorrectly calling writeStartObject()
• Fix String[] serializer registry to use StringArrayJsonSerializer instead of PrimitiveShortArrayJsonSerializer
• Add null checks in all primitive/string array deserializers
• Add null guard in ArrayJsonSerializer.serialize()
• Implement writeNull()/addNull() in GwtArrayJsonGenerator
• Fix JsonArrayImpl.set()/add() to handle JsonObjectImpl correctly
• Fix JsonObjectImpl.getInt()/getBoolean() to handle missing properties
• Fix JsonObjectImpl.asJsonObject() to return this
• Close JsonParser in AbstractObjectMapper.fromJSON()
• Replace unreachable null returns with proper exceptions in annotation processor
• Use LinkedHashSet for deterministic bean processing order
• Fix duplicate class collection and duplicate property handling in SchemaCollector
• Add null-safety checks in NamingUtils