Use PR_RW_GITHUB_TOKEN for draft-stale-prs workflow (#2608)

## Summary - The `draft-stale-prs` workflow was failing with "Resource not accessible by integration" when trying to convert fork PRs to draft via the GraphQL `convertPullRequestToDraft` mutation - The default `GITHUB_TOKEN` lacks the necessary cross-repo permissions for this operation - Switch to the `PR_RW_GITHUB_TOKEN` secret which has the required permissions #skip-bugbot ## Test plan - Trigger the workflow manually via `workflow_dispatch` and verify fork PRs are successfully converted to draft without "Resource not accessible by integration" errors 🤖 Generated with [Claude Code](https://claude.com/claude-code)  --- <a href="https://app.devin.ai/review/dyad-sh/dyad/pull/2608" target="_blank"> <picture> <source media="(prefers-color-scheme: dark)" srcset="https://static.devin.ai/assets/gh-open-in-devin-review-dark.svg?v=1"> <img src="https://static.devin.ai/assets/gh-open-in-devin-review-light.svg?v=1" alt="Open with Devin"> </picture> </a>  Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

Use PR_RW_GITHUB_TOKEN for draft-stale-prs workflow (#2608)
e699d96a · Will Chen · GitHub · 4aa7a011 · e699d96a
--- a/.github/workflows/draft-stale-prs.yml
+++ b/.github/workflows/draft-stale-prs.yml
@@ -16,6 +16,7 @@ jobs:
    steps:
      - uses: actions/github-script@v7
        with:
+          github-token: ${{ secrets.PR_RW_GITHUB_TOKEN }}
          script: |
            const sevenDaysAgo = new Date();
            sevenDaysAgo.setDate(sevenDaysAgo.getDate() - 7);