Is your feature request related to a problem or challenge? Please describe what you are trying to do.

ParquetMetaDataReader::decode_footer was deprecated in favor of ParquetMetaDataReader::decode_footer_tail, which returns a Result<FooterTail>. FooterTail is declared public, but the module it's defined in is not public. This seems to be an oversight, because it means that FooterTail is effectively private, making decode_footer_tail useless.

Describe the solution you'd like

Move the FooterTail definition to parquet/file/metadata/mod.rs, or have that file pub use it.

Describe alternatives you've considered

Additional context