fix(ipr): wrap createStatus payload so state reaches GitHub API

[bokelley]

Summary

One-line fix to scripts/ipr/github.mjs createStatus. Payload was being passed at the top level of the request options where request() expects it nested under body:. Result: outgoing request had no body, GitHub responded 422 Validation Failed: State is not included in the list.

Impact

Every PR's ipr-check has been failing since #3011 landed. Both the pending ("awaiting signature") and success ("already signed") status calls hit the same broken createStatus path. All currently-open PRs — mine, the 5.16 bump (#3034), the triage improvement chain (#3023, #3033), and every dependabot/feature PR — are red on this check.

Fix

Wrap the payload in { body: { ... } } so it actually gets sent. createIssueComment and updateIssueComment were already wrapping correctly; this restores symmetry.

 createStatus(owner, repo, sha, { state, context, description, targetUrl }) {
   return this.request('POST', `/repos/${owner}/${repo}/statuses/${sha}`, {
-    state,
-    context,
-    description: description?.slice(0, 140),
-    target_url: targetUrl,
+    body: {
+      state,
+      context,
+      description: description?.slice(0, 140),
+      target_url: targetUrl,
+    },
   });
 }

Branch protection note

This PR's own ipr-check will fail (the workflow checks out from main, where the bug still exists). Needs admin bypass on that check to merge, after which every subsequent PR's ipr-check will start working.

Test plan

• Typecheck clean
• Pre-commit unit tests pass
• Merge with ipr-check bypass
• Re-run CI on chore(deps): bump @adcp/client 5.15 → 5.16 + restore fresh replayed assertion #3034 — ipr-check should transition to pass

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