Fix add_labels strict-mode narrowing for CJS lint/typecheck

[Copilot]

The CJS workflow was failing on actions/setup/js/add_labels.cjs because the strict issue_intent metadata check did not narrow mixed label inputs cleanly for TypeScript. This change keeps the existing validation semantics while making the structured-label path explicit to the checker.

• Problem

  • message.labels accepts both strings and structured label objects.
  • In strict issue_intent mode, the missing-metadata check left label.name on a union type that TypeScript could not prove was object-shaped.

• Change

  • Replace the filter(...).map(...) path with a single loop that:
    • skips plain-string entries,
    • inspects only object labels,
    • records labels missing rationale or confidence.

• Behavior preserved

  • Strict mode still rejects label objects missing required intent metadata.
  • Error messages still include a stable fallback for malformed objects via "<unnamed>".

• Illustrative snippet

  const missingMetadataLabelNames = [];
  for (const label of requestedLabelInputs) {
    if (typeof label !== "object" || label === null) continue;
    if (!label.rationale || !label.confidence) {
      missingMetadataLabelNames.push(JSON.stringify(label.name ?? "<unnamed>"));
    }
  }

[Copilot]

Pull request overview

Refactors strict-mode label validation so TypeScript correctly narrows structured label inputs without changing runtime behavior.

Changes:

• Replaces filter().map() with explicit object narrowing.
• Preserves metadata validation and fallback label naming.

Show a summary per file

File	Description
actions/setup/js/add_labels.cjs	Makes strict-mode structured-label validation type-safe.

Review details

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• Files reviewed: 1/1 changed files
• Comments generated: 0
• Review effort level: Medium

[gh-aw-bot]

@copilot please run the pr-finisher skill and rerun checks once the branch is up to date.

Run: https://github.com/github/gh-aw/actions/runs/29683215651

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[github-actions]

🎉 This pull request is included in a new release.

Release: v0.82.14