Fix workflow permissions

[leynos]

Summary

• restrict contents permission for the CI workflow

Testing

• cargo fmt --all -- --check
• cargo clippy --all-targets --all-features -- -D warnings
• RUSTFLAGS="-D warnings" cargo test
• markdownlint '**/*.md' (fails: 23 errors)
• nixie docs/*.md

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https://chatgpt.com/codex/tasks/task_e_684f50d20eb08322a7c38fd18a30f0f8

Summary by Sourcery

CI:

• Add read-only contents permission to the CI job in ci.yml

Summary by CodeRabbit

• Chores
  • Updated CI workflow permissions to restrict access to read-only for repository contents.

[sourcery-ai]

Reviewer's Guide

This PR tightens the GitHub Actions CI workflow by adding a permissions block to restrict repository contents to read-only during the build-test job.

File-Level Changes

Change	Details	Files
Restrict CI workflow permissions for repository contents	Added a permissions section under the build-test job Set contents permission to read	.github/workflows/ci.yml

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[coderabbitai]

Walkthrough

The GitHub Actions CI workflow was updated to include a permissions block for the build-test job, restricting its access to read-only for repository contents. No other steps, environment variables, or job structures were changed.

Changes

File(s)	Change Summary
.github/workflows/ci.yml	Added permissions: contents: read to build-test job

Poem

In the warren of code, permissions now neat,
The build hops along with a read-only feat.
No nibbling on writes, just peeking at leaves,
The CI stays safe, as the repository weaves.
🐇✨

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📜 Recent review details

Configuration used: CodeRabbit UI
Review profile: CHILL
Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between d3cbf7a and 037eba8.

📒 Files selected for processing (1)

• .github/workflows/ci.yml (1 hunks)

⏰ Context from checks skipped due to timeout of 90000ms (1)

• GitHub Check: build-test

🔇 Additional comments (1)

.github/workflows/ci.yml (1)

10-11: Apply least privilege by restricting contents to read.

This aligns with the principle of least privilege for the CI token.
Please verify that none of the job’s steps require write access to the repository (e.g. creating tags, updating PR comments, or pushing changes).

✨ Finishing Touches

🧪 Generate Unit Tests

• Create PR with Unit Tests
• Commit Unit Tests in branch codex/add-permissions-block-to-ci.yml-workflow
• Post Copyable Unit Tests in Comment

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[sourcery-ai]

Hey @leynos - I've reviewed your changes and they look great!

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