Add explicit permissions blocks to GitHub Actions workflows

[DominicBM]

Summary

• Adds permissions: contents: read to all three GitHub Actions workflows to resolve 3 open CodeQL code scanning alerts (#1, #2, #3)
• All workflows use explicit AWS secrets for cloud access — they don't need any write permissions on GITHUB_TOKEN
• Restricting to least-privilege prevents token misuse if a third-party action in the workflow were ever compromised

Test plan

• Confirm the Scala CI workflow still passes on this PR
• Confirm CodeQL alerts are resolved after merge

🤖 Generated with Claude Code

Summary by CodeRabbit

• Chores
  • Updated GitHub Actions workflow permissions across deployment and build pipelines to align with security best practices.

[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

Run ID: 410294d1-87c4-4e02-ae63-b28d4b161e5a

📥 Commits

Reviewing files that changed from the base of the PR and between 5d79d40 and d067879.

📒 Files selected for processing (3)

• .github/workflows/deploy-staging.yml
• .github/workflows/deploy.yml
• .github/workflows/scala.yml

---

Walkthrough

Three GitHub Actions workflow files in the .github/workflows/ directory are updated to include a permissions block declaring contents: read access. No other behavioral changes are introduced; existing workflow steps and job logic remain unchanged.

Changes

Cohort / File(s)	Summary
GitHub Actions Workflow Permissions .github/workflows/deploy-staging.yml, .github/workflows/deploy.yml, .github/workflows/scala.yml	Added permissions: contents: read declaration to each workflow file, establishing minimal required permissions at the workflow level.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately and specifically describes the main change: adding explicit permissions blocks to GitHub Actions workflows across three files.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch fix/workflow-permissions

📝 Coding Plan

• Generate coding plan for human review comments

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands and usage tips.}