2025 Changelog

Backported in #87428: Disable s3_slow_all_threads_after_retryable_error by default. #87198 (Nikita Mikhaylov).

Backported in #87312: Fix KeeperMap tables created before 25.1, leaving data in ZooKeeper after the DROP query. #87112 (Nikolay Degterinsky).
Backported in #87168: Fix reading array with array sizes subcolumn in lazy materialization. #87139 (Pavel Kruglov).
Backported in #87394: Fixed incorrect accounting of temporary data deallocations in max_temporary_data_on_disk_size limit tracking, close #87118. #87140 (JIaQi).
Backported in #87329: Fix possible wrong result of non-correlated EXISTS. It was broken with execute_exists_as_scalar_subquery=1 which was introduced in https://github.com/ClickHouse/ClickHouse/pull/85481 and affects 25.8. Fixes #86415. #87207 (Nikolai Kochetov).
Backported in #87437: Fix "Too large size passed to allocator" LOGICAL_ERROR in JOIN due to mixed const and non-const blocks. #87231 (Azat Khuzhin).

Backported in #87302: Fix deadlock in PipelineExecutor downscaling logic. #86089 (Sergei Trifonov).