[Placeholder] Adoption of Apache Iceberg Verification #909

Consider adopting Apache Iceberg Verification once its initial fixtures are ready for integration. The project aims to provide shared, language-neutral conformance fixtures with expected values derived from the Iceberg specification, helping detect inconsistencies across implementations.

The original discussion ML thread: https://lists.apache.org/thread/8wsvnhktw27h0tqnxljzmnsogwd52tjj