Polars: py-1.14.0 Release

🚀 Performance improvements

• Increase default async thread count for low core count systems (#19829)
• Move row group decode off async thread for local streaming parquet scan (#19828)
• Support use of Duration in to_string, ergonomic/perf improvement, tz-aware Datetime bugfix (#19697)

✨ Enhancements

• Raise informative error on Unknown unnest (#19830)
• Support DataFrame init from raw SQLAlchemy rows (#19820)
• Support use of Duration in to_string, ergonomic/perf improvement, tz-aware Datetime bugfix (#19697)
• Add an is_literal method to expression meta namespace (#19773)
• A different approach to warning users of fork() issues with Polars (#19197)

🐞 Bug fixes

• Fix read_database(…,iter_batches=True) type annotations (#19832)
• Validate subnodes in validate IR (#19831)
• Raise if merge non-global categoricals in unpivot (#19826)
• Type hints for window_size incorrectly included timedelta in some rolling functions (#19827)
• Don't panic if column not found (#19824)
• Fix gather of Scalar null + idx w/ validity (#19823)
• Replace _kwargs in collect method (#19618)
• Fix object chunked gather (#19811)
• Fix filter scalar nulls (#19786)
• Replace spaces with   to support showing multiple spaces in HTML repr (#19783)
• Altair tooltip was being incorrectly applied to plots which did not accept it (#19789)
• Respect schema_overrides in batched csv reader (#19755)
• Fix scanning google cloud with service account credentials file (#19782)
• Release the GIL in Python APIs, part 2 of 2 (#19762)
• Fix incorrect filter after right-join on LazyFrame (#19775)
• Fix incorrect lazy schema for explode on array columns (#19776)
• Fixed typo in file lazy.py (#19769)

📖 Documentation

• Update bokeh to use cdn to avoid Bokeh Error (#19788)
• Change dprint config (#19747)
• Mention row_by_keys in the to_dict documentation (#19767)
• Fix link to Graphviz download (#19791)

🛠️ Other improvements

• Add ToField context for common args (#19833)
• Use polars parquet reader for delta scan (#19103)
• Migrate polars-expr AggregationContext to use Column (#19736)

Thank you to all our contributors for making this release possible! @MarcoGorelli, @TNieuwdorp, @YichiZhang0613, @alexander-beedie, @braaannigan, @coastalwhite, @engylemure, @gab23r, @iliya-malecki, @ion-elgreco, @itamarst, @jackxxu, @nameexhaustion, @orlp, @ritchie46, @rodrigogiraoserrao and @sn0rkmaiden