Harden Claude workflow permission gate

[justin808]

Summary

• add a workflow-level authorize_claude_actor permission gate before Claude Code runs
• require both the workflow actor and original Claude requester to have write/admin repository permission
• keep the existing Claude trigger condition on the authorization job and only run the secret-bearing Claude job when authorized

Changed workflows

• .github/workflows/claude.yml

Validation

• actionlint passed for the changed workflow file(s)

Rollout context

This mirrors the verified gate from shakacode/react_on_rails#4533.
Positive path was exercised on react_on_rails#4534; negative read-only actor attempts on react_on_rails#4540 blocked before the secret-bearing Claude job.

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Review details

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: e87fc9b0-2797-499b-93d1-9dc80b7d332b

📥 Commits

Reviewing files that changed from the base of the PR and between 27315f6 and dedcf2e.

📒 Files selected for processing (1)

• .github/workflows/claude.yml

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch codex/harden-claude-permission-gate

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