Add AI contribution commit trailer guidelines

[dev-hari-prasad]

Summary

Adds guidance to CONTRIBUTING.md requesting contributors to include commit trailers (e.g., Co-Authored-By, Generated-by) when AI tools are used in preparing PRs.

Background & Rationale

• Inspiration: Inspired by Apache Kafka's AI contribution guidelines.
• Makes tracking AI-assisted contributions quantitative, giving clarity on AI usage across pull requests.

Summary by CodeRabbit

• Documentation
  • Added contribution guidance for disclosing AI-assisted work.
  • Included supported commit trailer examples and a sample commit format.

[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: 5dcfaf75-72ff-4c56-8d7b-f157434e9e32

📥 Commits

Reviewing files that changed from the base of the PR and between d6e1552 and ede59e8.

📒 Files selected for processing (1)

• CONTRIBUTING.md

🚧 Files skipped from review as they are similar to previous changes (1)

• CONTRIBUTING.md

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Walkthrough

The contribution guide now instructs contributors to record AI-tool usage in commit trailers. It includes supported trailer formats and a sample commit.

Changes

AI Contribution Guidance

Layer / File(s)	Summary
Document AI usage commit trailers CONTRIBUTING.md	The guide adds instructions and examples for recording AI-tool usage with Co-Authored-By, Generated-by, or similar commit trailers.

Estimated code review effort: 1 (Trivial) | ~2 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the addition of AI contribution commit trailer guidance.
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

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[coderabbitai]

Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@CONTRIBUTING.md`:
- Around line 82-85: Update both fenced code blocks in the commit-message
examples in CONTRIBUTING.md to specify the text language identifier, including
the block containing Co-Authored-By and Generated-by and the block containing
the issue-title example, while leaving their contents unchanged.

🪄 Autofix

Fix all unresolved CodeRabbit comments on this PR:

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

---

ℹ️ Review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro Plus

Run ID: 34ffc72c-8098-480e-9a7b-ff56354563c9

📥 Commits

Reviewing files that changed from the base of the PR and between 067f7af and d6e1552.

📒 Files selected for processing (1)

• CONTRIBUTING.md