[BUG]: close-prs workflow failures are silent in the run log — no ::warning:: annotation

Description

When the close-prs workflow (.github/workflows/close-prs.yml) runs bun script/github/close-prs.ts and the script fails (GraphQL pagination error, token-scope error, unhandled exception), the workflow step fails silently. The error is buried in the full log with no visible ::warning:: annotation in the run summary.

This makes diagnosing close-prs failures unnecessarily hard — the run shows "failed" but you have to download and read the full log to find the error.

Plugins

N/A

OpenCode version

N/A (this is a CI workflow issue, not a runtime bug)

Steps to reproduce

1. Wait for the scheduled close-prs workflow to run (daily at 22:00 UTC)
2. If script/github/close-prs.ts exits non-zero (e.g., GraphQL token-scope error, unhandled exception)
3. The workflow step fails with no annotation in the run summary — only the raw exit code in the log

Screenshot and/or share link

N/A — this is a CI workflow observability issue, not a UI bug.

Operating System

GitHub Actions (ubuntu-latest)

Terminal

GitHub Actions runner

Proposed fix

Wrap the bun invocation so a non-zero exit code emits a ::warning:: annotation:

bun script/github/close-prs.ts "${args[@]}" || {
  exit_code=$?
  echo "::warning::close-prs.ts exited with code $exit_code — check logs for GraphQL/token-scope errors"
  exit $exit_code
}

The exit code is still propagated, so the workflow step still fails — but the failure reason is visible at a glance in the run summary.

PR: #42151