fix: show UNKNOWN in status when a PR's live state cannot be fetched

[vitali87]

Summary

status fell back to the recorded PRRecord.state whenever the live gh pr view lookup returned nothing. That recorded state is never written back after merge/clean, so it is always open — a merged, closed, or deleted PR (or any run with gh unauthenticated) was shown as a confident OPEN with no hint that the fetch had failed.

Now an unfetchable PR renders UNKNOWN and a yellow line after the table lists the affected PR numbers with a pointer to gh auth status. README's status paragraph documents this.

Test plan

• test_unfetchable_state_is_unknown_not_open (one PR {}, one MERGED): UNKNOWN and MERGED shown, no OPEN, warning names #7 — fails on main with OPEN
• test_live_state_and_review_are_shown: normal path unchanged, no warning
• 446 tests pass, ruff clean
• Local review: 5/5

[coderabbitai]

Warning

Review limit reached

Next included review available in 46 minutes.

View limit details

Limit details: You’ve used the included review currently available.

You've used all free OSS reviews for now. Wait for the free limit to reset to keep reviewing this public repository.

Learn how review limits work.

Review configuration:

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: 50eb59d9-7b90-4146-8987-37a7f0dab12f

📥 Commits

Reviewing files that changed from the base of the PR and between 7878a8d and 40367e4.

📒 Files selected for processing (3)

• README.md
• pr_split/cli.py
• tests/test_cli_coverage.py

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands.}