Verify GitHub workflows have correct token permissions for git push operations

[Copilot]

This PR addresses the requirement to audit GitHub workflows for proper token permissions when performing git push operations.

Analysis Results

After thoroughly examining all GitHub workflows in .github/workflows/, I found:

✅ Repository is already properly configured

Workflows that perform git push operations:

• benchmark.yml - The store_benchmark job uses benchmark-action/github-action-benchmark with auto-push: true to push benchmark results to the gh-pages branch

Current permissions status:

• The store_benchmark job already has the required contents: write permission (line 49)
• Also includes deployments: write for GitHub Pages deployment
• Permissions are correctly scoped at the job level

Other workflows checked:

• project_management_comment.yml uses peter-evans/create-or-update-comment but only modifies issue comments via GitHub API (no git operations)
• All remaining workflows perform only read operations or interact with external services
• No additional workflows require contents: write permission

Conclusion

All workflows that perform git push operations already have the required contents: write permission. The repository follows GitHub security best practices with minimal, job-scoped permissions.

No code changes were necessary - this PR serves as documentation of the security audit performed.

Fixes #83.

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