parquet-tyfoom

https://github.com/cameronmccord2/parquet-ruby

Tyfoom's fork of the `parquet` gem (github.com/njaremko/parquet-ruby), published while the incremental streaming-write fix is pending upstream. It wraps the official Apache Rust implementation and bounds write memory by streaming row groups to disk instead of buffering the whole file. Drop-in compatible with the upstream gem: the library is still required as `require "parquet"` and exposes the same `Parquet` API.