Update to 26.10

[jolorunyomi]

This PR updates the repository to version 26.10.

This is part of the 26.08 release burndown process.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Enterprise

Run ID: 3153d182-e003-41ed-b4b5-0a4491e2ff56

📥 Commits

Reviewing files that changed from the base of the PR and between 6eefedb and 17a9ad0.

📒 Files selected for processing (16)

• .devcontainer/cuda12.9-conda/devcontainer.json
• .devcontainer/cuda12.9-pip/devcontainer.json
• .devcontainer/cuda13.3-conda/devcontainer.json
• .devcontainer/cuda13.3-pip/devcontainer.json
• .github/workflows/build.yaml
• .github/workflows/pr.yaml
• UCXX_VERSION
• VERSION
• conda/environments/all_cuda-129_arch-aarch64.yaml
• conda/environments/all_cuda-129_arch-x86_64.yaml
• conda/environments/all_cuda-133_arch-aarch64.yaml
• conda/environments/all_cuda-133_arch-x86_64.yaml
• dependencies.yaml
• python/libraft/pyproject.toml
• python/pylibraft/pyproject.toml
• python/raft-dask/pyproject.toml

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📝 Walkthrough

Summary by CodeRabbit

• New Features
  • Updated the project to the RAPIDS 26.10 release and UCXX 0.52.
  • Refreshed CUDA 12.9 and 13.3 development environments and documentation build environments.
  • Updated RAFT, RMM, Dask-CUDA, UCXX, and related package versions for compatibility with the new release.

Walkthrough

Changes

The project advances its release metadata from 26.08/0.51 to 26.10/0.52, updates coordinated RAPIDS and UCXX dependency constraints, and refreshes CUDA devcontainer and documentation-build images.

Release and Dependency Refresh

Layer / File(s)	Summary
Release metadata and environment pins VERSION, UCXX_VERSION, conda/environments/*	Updates release identifiers and CUDA 12.9/13.3 environment pins across aarch64 and x86_64 configurations.
Dependency matrix constraints dependencies.yaml	Updates unsuffixed and CUDA-specific constraints for UCXX, RAFT, Dask, RMM, and related packages.
Python package requirements python/libraft/pyproject.toml, python/pylibraft/pyproject.toml, python/raft-dask/pyproject.toml	Aligns runtime and build-backend requirements with the 26.10 dependency series and updates the raft-dask SPDX header.
Development and CI images .devcontainer/*/devcontainer.json, .github/workflows/build.yaml, .github/workflows/pr.yaml	Updates CUDA devcontainer images, feature references, container names, and documentation-build images to 26.10.

Estimated code review effort: 3 (Moderate) | ~20 minutes

Suggested reviewers: bdice, kylefromnvidia

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly summarizes the main change: upgrading the repository to 26.10.
Description check	✅ Passed	The description is directly related to the changeset and explains the 26.10 version update.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch version-update-26.10

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