chore: bump codespell version for Python 3.14+ compatibility

[gforsyth]

Description

xref rapidsai/build-planning#205
xref rapidsai/build-planning#152

Python 3.14 brings with it newer versions of setuptools that are
incompatible with older license formats in pyproject.toml. We fixed this
for RAPIDS in rapidsai/build-planning#152. codespell needs to be bumped
to version 2.4.1 to be compatible with newer setuptools.

[coderabbitai]

📝 Walkthrough

Summary by CodeRabbit

• Chores
  • Updated pre-commit tooling configuration (codespell) and ignore-list; updated SPDX copyright year ranges across the project.
• Documentation
  • Fixed numerous spelling/typo issues in docs, docstrings, comments, notebooks, and the wiki for clearer wording.
• Tests
  • Corrected test variable name typos to improve test clarity.

Walkthrough

Minor non-functional edits across the repo: pre-commit/tooling configuration updates, SPDX year bumps, and numerous comment/docstring/markdown typo fixes; one test variable rename in Python tests. No API, signature, logic, or behavior changes.

Changes

Cohort / File(s)	Summary
Tooling / Config \.pre-commit-config.yaml, pyproject.toml	Updated codespell pre-commit hook revision to v2.4.1 and extended codespell ignore-words-list; no other hook settings changed. SPDX year in pyproject.toml updated.
C++ headers & sources (SPDX + comments) cpp/include/.../kernel_shap.hpp, cpp/include/.../program.h, cpp/include/.../lars.hpp, cpp/include/.../svm/svm_api.h, cpp/src/.../kernel_shap.cu, cpp/src/.../lars_impl.cuh, cpp/src/.../smoblocksolve.cuh, cpp/src/.../builder_kernels.cuh, cpp/src/umap/.../naive.cuh, cpp/src_prims/.../device_utils.cuh	Bumped SPDX years and fixed multiple typos/wording in comments and Doxygen strings. No changes to function signatures or implementation logic.
C++ tests cpp/tests/sg/dbscan_test.cu	SPDX year update and corrected inline comment spellings only.
Python code & tests python/cuml/.../base.py, python/cuml/.../func.py, python/cuml/.../mixins.py, python/cuml/tests/test_hdbscan.py	SPDX year updates, docstring/comment typo fixes; in tests renamed local variable probabilties → probabilities and updated assertions. No public API changes.
Docs, notebooks, wiki docs/source/cuml-accel/faq.rst, notebooks/target_encoder_walkthrough.ipynb, wiki/python/ESTIMATOR_GUIDE.md	Corrected typos/duplicated words in documentation and notebook markdown. No content structure changes.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Suggested reviewers

• dantegd
• csadorf

🚥 Pre-merge checks | ✅ 2 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 62.50% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately describes the main change: bumping codespell version for Python 3.14+ compatibility, which is supported by .pre-commit-config.yaml and pyproject.toml modifications.
Description check	✅ Passed	The description is directly related to the changeset, explaining the motivation (Python 3.14 setuptools incompatibility) and the solution (bump codespell to v2.4.1) with relevant issue references.

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✨ Finishing Touches

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• Create PR with unit tests

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[tarang-jain]

Looks like many spelling errors need to be fixed.

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[gforsyth]

We'll want to ignore the typo fix commit in .git-blame-ignore-revs -- we can either merge this and add the commit in a follow-up, or I can add it now and we could /merge nosquash to preserve the commit sha.

[jameslamb]

we can either merge this and add the commit in a follow-up

I vote add in a follow-up and admin-merge that followup to save CI resources.

Just in case this PR gets stuck because of some other CI failure and you end up needing to add merge commits to pull in latest main.

[bdice]

We'll want to ignore the typo fix commit in .git-blame-ignore-revs

These changes don't seem significant enough to warrant that in my opinion. Typically we only consider that for massive formatting changes (thousands of lines, not +42/-42).

[coderabbitai]

Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against the current code and only fix it if needed.

Inline comments:
In `@python/cuml/tests/test_hdbscan.py`:
- Line 468: In test_hdbscan_empty_cluster_tree replace the unused unpacked
variable by either using a throwaway name or asserting it: change the unpack
from "labels, probabilities = _extract_clusters(" to "labels, _ =
_extract_clusters(" (or add an explicit assertion on probabilities) so the
unused value no longer triggers RUF059; locate the unpack in the
test_hdbscan_empty_cluster_tree function where _extract_clusters is called and
update the second target as described.

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

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ℹ️ Review info

⚙️ Run configuration

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Run ID: 9b71455b-d467-4885-9945-3e9eda485600

📥 Commits

Reviewing files that changed from the base of the PR and between 20dc810 and b8b3a5a.

📒 Files selected for processing (19)

• cpp/include/cuml/explainer/kernel_shap.hpp
• cpp/include/cuml/genetic/program.h
• cpp/include/cuml/solvers/lars.hpp
• cpp/include/cuml/svm/svm_api.h
• cpp/src/decisiontree/batched-levelalgo/kernels/builder_kernels.cuh
• cpp/src/explainer/kernel_shap.cu
• cpp/src/solver/lars_impl.cuh
• cpp/src/svm/smoblocksolve.cuh
• cpp/src/umap/fuzzy_simpl_set/naive.cuh
• cpp/src_prims/common/device_utils.cuh
• cpp/tests/sg/dbscan_test.cu
• docs/source/cuml-accel/faq.rst
• notebooks/target_encoder_walkthrough.ipynb
• pyproject.toml
• python/cuml/cuml/dask/common/base.py
• python/cuml/cuml/dask/common/func.py
• python/cuml/cuml/internals/mixins.py
• python/cuml/tests/test_hdbscan.py
• wiki/python/ESTIMATOR_GUIDE.md

✅ Files skipped from review due to trivial changes (18)

• python/cuml/cuml/dask/common/func.py
• notebooks/target_encoder_walkthrough.ipynb
• cpp/src/decisiontree/batched-levelalgo/kernels/builder_kernels.cuh
• cpp/src/explainer/kernel_shap.cu
• cpp/src_prims/common/device_utils.cuh
• cpp/src/svm/smoblocksolve.cuh
• wiki/python/ESTIMATOR_GUIDE.md
• docs/source/cuml-accel/faq.rst
• cpp/include/cuml/svm/svm_api.h
• cpp/include/cuml/solvers/lars.hpp
• cpp/tests/sg/dbscan_test.cu
• cpp/include/cuml/genetic/program.h
• cpp/include/cuml/explainer/kernel_shap.hpp
• python/cuml/cuml/internals/mixins.py
• python/cuml/cuml/dask/common/base.py
• cpp/src/solver/lars_impl.cuh
• pyproject.toml
• cpp/src/umap/fuzzy_simpl_set/naive.cuh

[gforsyth]

/merge