Improve timeout verbosity and graceful shutdown for pytest CI jobs

[csadorf]

Summary

• Adds -v to all timeout invocations that were missing it, so cancellations are reported to the CI log.
• Adds --signal=SIGINT --kill-after=60s to every timeout wrapping a pytest invocation, so pytest receives SIGINT on timeout (prints a partial test summary) and is hard-killed 60 s later if it has not exited.
• Non-pytest timeout calls (run_ctests.sh, BERTopic smoke test) are left unchanged (already had -v).

Eight files changed, all in ci/: test_python_singlegpu.sh, test_python_integration.sh, test_python_dask.sh, test_python_scikit_learn_tests.sh, test_python_sklearn_examples.sh, test_python_cuml_accel_upstream.sh, test_wheel.sh, test_wheel_dask.sh.

[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: Pro Plus

Run ID: 19b20ec2-da81-46b0-b323-17639e304e1b

📥 Commits

Reviewing files that changed from the base of the PR and between 9f83155 and 82b4517.

📒 Files selected for processing (8)

• ci/test_python_cuml_accel_upstream.sh
• ci/test_python_dask.sh
• ci/test_python_integration.sh
• ci/test_python_scikit_learn_tests.sh
• ci/test_python_singlegpu.sh
• ci/test_python_sklearn_examples.sh
• ci/test_wheel.sh
• ci/test_wheel_dask.sh

---

📝 Walkthrough

Summary by CodeRabbit

Release Notes

• Chores
  • Updated test execution timeouts across CI pipelines to use graceful interrupt signals with a 60-second grace period before forced termination, improving cleanup behavior
  • Enhanced timeout operation visibility with verbose logging for better test execution monitoring

Walkthrough

Eight CI shell scripts are updated to modify timeout command invocations, adding explicit signal handling (--signal=SIGINT) and post-interrupt termination behavior (--kill-after=60s) to improve process cleanup on test timeouts.

Changes

Cohort / File(s)	Summary
Python test runners ci/test_python_cuml_accel_upstream.sh, ci/test_python_dask.sh, ci/test_python_integration.sh, ci/test_python_scikit_learn_tests.sh, ci/test_python_singlegpu.sh, ci/test_python_sklearn_examples.sh	Updated timeout invocations to add --signal=SIGINT --kill-after=60s flags and verbose output (-v where applicable), changing how test processes are interrupted and terminated on timeout.
Wheel test runners ci/test_wheel.sh, ci/test_wheel_dask.sh	Updated timeout invocations wrapping test scripts to include --signal=SIGINT --kill-after=60s flags, providing explicit interrupt signal and forced termination behavior.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~8 minutes

Possibly related PRs

• Run all scikit-learn examples under cuml.accel in nightlies #7960: Directly modifies the same CI command for scikit-learn examples test runner.
• Add -v option to timeout in CI scripts #7966: Updates the same CI scripts' timeout invocations with overlapping flag additions.

Suggested labels

ci, improvement, non-breaking

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and concisely summarizes the main change: improving timeout verbosity and graceful shutdown for pytest CI jobs, which accurately reflects the core objective of adding -v flags and --signal=SIGINT --kill-after=60s to timeout invocations.
Description check	✅ Passed	The description is directly related to the changeset, providing clear context on what was changed (8 CI files), why it was changed (better logging and graceful shutdown), and which timeout invocations were modified versus left unchanged.
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.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

---

_{Comment @coderabbitai help to get the list of available commands and usage tips.}

[csadorf]

/merge