fix(tcfeed): finish a pair the run left half-open

[ralyodio]

GitHub returned 502s for a stretch this afternoon and two repositories came out of it with an issue and no pull request:

· DingTalk-Real-AI/dingtalk-workspace-cli — could not fork: HTTP 502
· GSF-001/ARCLUX — failed: failed to push some refs

Their issues say "I am opening a pull request alongside this so the diff is there to read", which is now untrue — a promise made to a maintainer and then not kept.

The issue dedup added with the issue-first flow was too coarse to repair it: any issue, in any state, meant never ask again.

The two states mean opposite things

Reaching that check means no pull request exists in any state, so an issue on its own says which of two things happened:

• closed — they answered, and the answer was no. Exactly what the issue is for, and it must never be followed by a pull request.
• open — the pair was interrupted between the two calls. Finishing it is not a second ask; it is the first one, completed.

An open issue is now carried out of prTarget so the run reuses it instead of opening a duplicate, and says so.

Verified both directions

tsc --strict --noEmit clean.

Resumes onto the existing issue:

$ tcfeed pr GSF-001/ARCLUX --dry-run
· GSF-001/ARCLUX — finishing https://github.com/GSF-001/ARCLUX/issues/299, which has no request yet
· GSF-001/ARCLUX — dry run

And a repository that already answered still skips:

$ tcfeed pr GlassHaven/Haven --dry-run
· GlassHaven/Haven — skipped: already asked — closed, https://github.com/GlassHaven/Haven/pull/532

🤖 Generated with Claude Code