Bump ray from 2.48.0 to 2.52.0 in /requirements

[dependabot]

Bumps ray from 2.48.0 to 2.52.0.

Release notes

Sourced from ray's releases.

Ray-2.52.0

Release Highlights

Ray Core:

• End of Life for Python 3.9 Support: Ray will no longer be releasing Python 3.9 wheels from now on.
• Token authentication: Ray now supports built-in token authentication across all components including the dashboard, CLI, API clients, and internal services. This provides an additional layer of security for production deployments to reduce the risk of unauthorized code execution. Token authentication is initially off by default. For more information, see: https://docs.ray.io/en/latest/ray-security/token-auth.html

Ray Data:

• We’ve added a number of improvements for Iceberg, including upserts, predicate and projection pushdown, and overwrite.
• We’ve added significant improvements to our expressions framework, including temporal, list, tensor, and struct datatype expressions.

Ray Libraries

Ray Data

🎉 New Features:

• Added predicate pushdown rule that pushes filter predicates past eligible operators (#58150,[ #58555](ray-project/ray#58555))
• Iceberg support for upsert tables, schema updates, and overwrite operations (#58270)
• Iceberg support for predicate and projection pushdown (#58286)
• Iceberg write datafiles in write() then commit (#58601)
• Enhanced Unity Catalog integration (#57954)
• Namespaced expressions that expose PyArrow functions (#58465)
• Added version argument to read_delta_lake (#54976)
• Generator UDF support for map_groups (#58039)
• ApproximateTopK aggregator (#57950)
• Serialization framework for preprocessors (#58321)
• Support for temporal, list, tensor, and struct datatypes (#58225)

💫 Enhancements:

• Use approximate quantile for RobustScaler preprocessor (#58371)
• Map batches support for limit pushdown (#57880)
• Make all map operations zero-copy by default (#58285)
• Use tqdm_ray for progress reporting from workers (#58277)
• Improved concurrency cap backpressure tuning (#58163,[ #58023](ray-project/ray#58023 #57996](ray-project/ray#57996))
• Sample finalized partitions randomly to avoid lens effect (#58456)
• Allow file extensions starting with '.' (#58339)
• Set default file_extensions for read_parquet (#56481)
• URL decode values in parse_hive_path (#57625)
• Streaming partition enforces row_num per block (#57984)
• Streaming repartition combines small blocks (#58020)
• Lower DEFAULT_ACTOR_MAX_TASKS_IN_FLIGHT_TO_MAX_CONCURRENCY_FACTOR to 2 (#58262)
• Set udf-modifying-row-count default to false (#58264)
• Cache PyArrow schema operations (#58583)
• Explain optimized plans (#58074)
• Ranker interface (#58513)

🔨 Fixes:

• Fixed renamed columns to be appropriately dropped from output (#58040,[ #58071](ray-project/ray#58071))
• Fixed handling of renames in projection pushdown (#58033,[ #58037](ray-project/ray#58037))
• Fixed broken LogicalOperator abstraction barrier in predicate pushdown rule (#58683)
• Fixed file size ordering in download partitioning with multiple URI columns (#58517)
• Fixed HTTP streaming file download by using open_input_stream (#58542)
• Fixed expression mapping for Pandas (#57868)

... (truncated)

Commits

• 9527a55 [core] Cherry pick token authentication UX improvements (#58831)
• d7f8055 [core] Cherry pick fallback authorization header (#58826)
• 1cd18e2 [core] Cherry pick token generation change (#58825)
• 56afc3f [core] Cherry pick KubeRay authentication guide (#58824)
• 3cd2f9d cherrypick #58762 (#58814)
• d72c20e cherrypick #58765 (#58812)
• 7be797e [core] Cherry pick use-after-free fix in RayletClient (#58747)
• 519975f [release] keep building python 3.9 wheel for internal testing (#58732)
• 78260b9 change version to 2.52.0 (#58730)
• 323e92b [deps][ci] correctly checking for valid subset (#58716)
• Additional commits viewable in compare view

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Bug: Ray 2.52.0 breaks Python 3.9 compatibility

The pinned ray==2.52.0 version drops Python 3.9 support (no wheels are published), but the project still officially supports Python 3.9 per pyproject.toml (requires-python = ">=3.9,<3.14"). This will cause test dependency installation to fail on Python 3.9 environments. Either the ray version needs a Python version environment marker (e.g., ray==2.52.0; python_version >= '3.10') with a fallback for Python 3.9, or Python 3.9 support needs to be officially dropped from the project.

 

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[dependabot]

OK, I won't notify you again about this release, but will get in touch when a new version is available. If you'd rather skip all updates until the next major or minor version, let me know by commenting @dependabot ignore this major version or @dependabot ignore this minor version.

If you change your mind, just re-open this PR and I'll resolve any conflicts on it.