Add pre-commit config for repo hygiene and secret detection

[Harshaada]

Description

Updated .pre-commit-config.yaml with gitleaks for secret detection.
Updated CONTRIBUTING.md with steps to install and enable pre-commit locally.

Related Issues

Type of Change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation update
• Refactoring (no functional changes)
• CI/CD or infrastructure change
• Dependency update

Checklist

• My code follows the project's coding standards (Ruff, MyPy, pydocstyle)
• I have added tests that prove my fix is effective or my feature works
• All new and existing tests pass (make test)
• Pre-commit hooks pass (make pre-commit)
• Code coverage remains >= 80% (make coverage)
• I have updated documentation where necessary
• I have updated CHANGELOG.md (if applicable)
• My PR title follows Conventional Commits format

Testing

Screenshots / Logs

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: 5e2e38c9-53dd-48ba-a9f7-a2e4209160fb

📥 Commits

Reviewing files that changed from the base of the PR and between 286b9e7 and 0130706.

📒 Files selected for processing (3)

• .pre-commit-config.yaml
• CONTRIBUTING.md
• README.md

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📝 Walkthrough

Summary by CodeRabbit

• Security

  • Added automated detection for private keys and secrets before code is committed.
  • Added guidance for enabling repository secret scanning and push protection.

• Documentation

  • Updated setup and Quick Start instructions with the new security checks and recommended practices.

Walkthrough

The repository updates pre-commit hooks, enables detect-private-key and Gitleaks, and documents local and GitHub secret-scanning requirements.

Changes

Secret scanning setup

Layer / File(s)	Summary
Configure secret-scanning checks .pre-commit-config.yaml, CONTRIBUTING.md, README.md	The pre-commit configuration upgrades pre-commit-hooks, enables detect-private-key, and adds Gitleaks. Setup documentation identifies these checks and GitHub Secret Scanning and Push Protection requirements.

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

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly summarizes the pre-commit configuration and secret-detection changes.
Description check	✅ Passed	The description accurately covers the Gitleaks configuration and local pre-commit setup documentation.
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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[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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