[CI] Use the default cpu8 node

[chyunsu3]

Closes #22

The default cpu8 node should be sufficient for this library.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

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📥 Commits

Reviewing files that changed from the base of the PR and between 949bf82 and 5b7e410.

📒 Files selected for processing (2)

• .github/workflows/build.yaml
• .github/workflows/pr.yaml

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📝 Summary

Summary by CodeRabbit

• Chores
  • Updated several automated build jobs to use 8-core runners instead of 16-core runners.

Walkthrough

Five CI jobs in the build and pull request workflows now request cpu8 nodes instead of cpu16 nodes.

Changes

CI runner updates

Layer / File(s)	Summary
Set CI build jobs to cpu8 .github/workflows/build.yaml, .github/workflows/pr.yaml	The cpp-build and wheel-build-libnvforest jobs in build.yaml, plus the conditional CPU C++ build, conda C++ build, and libnvforest wheel build in pr.yaml, now request cpu8 nodes instead of cpu16 nodes.

Priority: ⬇️ Low

Estimated code review effort: 1 (Trivial) | ~5 minutes

Change: Other

Merge Risk: ⚪ Minimal · up to 5b7e4

No merge-blocking issue is established. The affected jobs’ performance on cpu8 has not been verified in the supplied evidence.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Linked Issues check	✅ Passed	Issue #22 asks to test the default cpu8 node in build jobs. The change summary reports that the relevant C++ and libnvforest wheel build jobs in .github/workflows/build.yaml and `.github/workflows/p…
Out of Scope Changes check	✅ Passed	The reported changes only switch build-job node sizes from cpu16 to cpu8. This directly supports issue #22. The whole-PR diff inspection failed because repository objects were unavailable, so this…
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
Title check	✅ Passed	The title clearly summarizes the main change: CI jobs will use the default cpu8 node.
Description check	✅ Passed	The description explains that cpu8 should be sufficient for the library and references the linked issue.

✨ Finishing Touches

🧪 Generate unit tests (beta)

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[chyunsu3]

/merge