__arrow_c_stream__

This release introduces several performance improvements, new features like Iceberg schema evolution and correlated subqueries, and numerous bug fixes. It also deprecates the `rechunk` parameter and related functions.

This release introduces significant performance improvements across various operations, including pushdown optimizations, enhanced join strategies, and more efficient memory handling. It also brings a host of new features like `struct.drop()`, improved CSV scanning, and experimental out-of-core spilling, alongside numerous bug fixes for enhanced stability and correctness.

This release focuses heavily on performance improvements across group-by operations, native aggregations, and data parsing, while stabilizing Decimal support and introducing several new features like ewm_mean in streaming and enhanced list/array aggregations. Two functions, Expr.agg_groups() and pl.groups(), have been deprecated.