chore(gui): pin react-doctor to 0.9.1

[Wibias]

Summary

• Bump the advisory React Doctor engine pin from 0.7.8 to 0.9.1 in GUI scripts, CI workflow, README, and contract tests so local/doctor:gui and CI stay aligned.

Test plan

• bun test tests/ci-workflows.test.ts
• Confirm React Doctor CI workflow still runs advisory-only against gui/

Summary by CodeRabbit

• Updates
  • Updated React Doctor to version 0.9.1 across automated checks and project commands.
  • Refreshed documentation to reflect the updated React Doctor version.
• Tests
  • Updated validation checks to confirm React Doctor 0.9.1 is configured consistently.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: ASSERTIVE

Plan: Pro Plus

Run ID: 926212d2-1a2a-46a3-913e-036f8d54e732

📥 Commits

Reviewing files that changed from the base of the PR and between e0b7458 and c03ed0a.

📒 Files selected for processing (4)

• .github/workflows/react-doctor.yml
• gui/README.md
• gui/package.json
• tests/ci-workflows.test.ts

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📝 Walkthrough

Walkthrough

React Doctor is upgraded from 0.7.8 to 0.9.1 across the CI workflow and GUI scripts. The README and CI hardening tests are updated to reflect the new pinned version.

Changes

React Doctor version update

Layer / File(s)	Summary
Synchronize React Doctor version pins .github/workflows/react-doctor.yml, gui/package.json, gui/README.md, tests/ci-workflows.test.ts	The workflow and doctor scripts now use React Doctor 0.9.1; documentation and CI assertions are updated accordingly.

Estimated code review effort: 1 (Trivial) | ~3 minutes

Suggested reviewers: ingwannu, lidge-jun

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title is concise and accurately summarizes the main change: pinning react-doctor to 0.9.1 in the GUI-related files.
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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