v3.12.2

Added

• @AutoType now supports lengthRef for variable-length strings/arrays/collections with auto type inference.
• Checksum enhancements: range-based checksum calculation support.
• Documentation: added docs/variable-length.md (variable length & struct arrays) and new integration pages docs/netty-integration.md, docs/kafka-integration.md.
• Variable-length support: via lengthRef referencing a count field, enabling variable-length strings/arrays and struct arrays.

Changed

• Proxy forwarding: ProtocolType.proxy(AutoType, ...) forwards lengthRef to target annotations (e.g., StringType, *ArrayType, StructArrayType).
• Docs & examples: help sidebar includes “Variable Length & Struct Arrays”; installation snippets updated to 3.12.2.

Fixed

• DateCodecTest stability: truncate Instant/LocalDateTime to milliseconds.