Fix PR analysis workflow permissions

[SarthakKharche]

Summary

Adds a GitHub Actions workflow (.github/workflows/pr-analysis.yml) that automatically runs QyverixAI code analysis on every pull request. The workflow detects changed .py, .js, and .ts files, sends each to the QyverixAI /analyze/ endpoint, and posts a formatted comment to the PR with scores, grades, and issues per file. If any file scores below 60, a needs-improvement label is automatically created and applied.

Fixes #130

Type of Change

• Bug fix
• New feature
• Documentation update
• Refactor

Testing

• I ran backend tests (pytest -q)
• I tested frontend behavior manually

Checklist

• Code is readable and beginner-friendly
• No fake or placeholder behavior introduced
• Documentation updated if needed

[imDarshanGK]

@SarthakKharche Please update the PR with screenshots or implementation proof so the changes can be verified easily.
and link the related issue number in the PR description (example: Fixes #issue_number).

[SarthakKharche]

@imDarshanGK
I have successfully edited the PR description with Fix Number. Also I have resolved the conflicts and have attached the screenshots of the work.
Please review it once.

Thank You

[imDarshanGK]

@SarthakKharche Please remove the hard dependency on QYVERIXAI_API_KEY or make it optional with a safe public default. The PR analysis action should work without extra secret setup, since the QyverixAI backend is already public-facing for this use case. Once that is fixed, I can re-review

[SarthakKharche]

@imDarshanGK
I have updated it. Now QYVERIXAI_API_KEY is optional with a safe public fallback.
Plz review and merge it.

Thank You