fix: use closedByPullRequestsReferences in gh_issue_close (#5)

[four-bytes-robby]

fixes issue #5 — gh_issue_close crashed on the removed closedByPullRequestsUrls JSON field; switched to closedByPullRequestsReferences (array of {number, url}).

Closes #5

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Summary by cubic

Fixes gh_issue_close crashing on the removed closedByPullRequestsUrls JSON field by switching to closedByPullRequestsReferences, which returns an array of {number, url} objects. The zombie-issue output now shows both the PR number and URL.

^{Written for commit 1bf4cc5. Summary will update on new commits.}

Summary by CodeRabbit

• Bug Fixes
  • Improved closed-issue detection by using pull request references directly.
  • Issue details now display both the pull request number and URL when identifying issues closed by pull requests.
  • Updated issue data handling to provide more complete and reliable pull request information.

[coderabbitai]

Caution

Review failed

The pull request is closed.

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Team

Run ID: a050bd2a-68df-46c4-a2c1-400f59f990ab

📥 Commits

Reviewing files that changed from the base of the PR and between 80ab0b6 and 1bf4cc5.

📒 Files selected for processing (1)

• src/tools/gh-issue-close.ts

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📝 Walkthrough

Walkthrough

The issue closure tool now requests GitHub’s closedByPullRequestsReferences field, models pull request numbers and URLs, and displays both values during zombie-issue detection.

Changes

Issue closure field update

Layer / File(s)	Summary
Update issue view references src/tools/gh-issue-close.ts	The IssueView interface and gh issue view request use closedByPullRequestsReferences. Zombie detection iterates the reference objects and prints each URL with its pull request number.

Estimated code review effort: 2 (Simple) | ~10 minutes

✨ Finishing Touches 💡 1

🛠️ Fix failing CI checks 💡

• Create stacked PR
• Commit on current branch

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/5-gh-issue-close-json-field

✨ Simplify code

• Create PR with simplified code
• Commit simplified code in branch fix/5-gh-issue-close-json-field

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