fix(triage): replace timelineItems with separate gh pr open search

Remove the unsupported `timelineItems` field from `ghIssueView`, add
`ghPrSearchOpen` wrapper, and synthesize `issue.timelineItems` in the
main loop so `classifyIssue` stays unchanged.

scripts/features/feature-triage.mjs

@@ -144,6 +144,18 @@ async function main(argv, env, deps = defaultDeps) {
       continue;
     }
 
+    // Synthesize timelineItems from open PR search (gh issue view doesn't expose timelineItems)
+    let openPrs = [];
+    try {
+      openPrs = deps.ghPrSearchOpen(args.owner, args.repo, num);
+    } catch (e) {
+      warnings.push({ level: "warn", issue: num, message: `open PR search failed: ${e.message}` });
+    }
+    issue.timelineItems = openPrs.map((pr) => ({
+      __typename: "CrossReferencedEvent",
+      source: { __typename: "PullRequest", state: "OPEN", number: pr.number },
+    }));
+
     const mergedPrs = deps.ghPrSearchMerged(args.owner, args.repo, num);
     const gitCommits = deps.gitLogGrep(`#${num}`).filter((c) => deps.gitIsAncestor(c.hash, "main"));
     const del = detectDelivered(num, { mergedPrs, changelog: changelogText, gitCommits });

scripts/features/lib/github.mjs

@@ -61,7 +61,24 @@ export function ghIssueView(owner, repo, number) {
     "--repo",
     `${owner}/${repo}`,
     "--json",
-    "number,title,url,body,state,stateReason,labels,author,assignees,createdAt,closedAt,comments,reactionGroups,timelineItems",
+    "number,title,url,body,state,stateReason,labels,author,assignees,createdAt,closedAt,comments,reactionGroups",
+  ]);
+}
+
+export function ghPrSearchOpen(owner, repo, issueNumber) {
+  return runJson("gh", [
+    "pr",
+    "list",
+    "--repo",
+    `${owner}/${repo}`,
+    "--state",
+    "open",
+    "--search",
+    `#${issueNumber}`,
+    "--json",
+    "number,title,body",
+    "--limit",
+    "10",
   ]);
 }
 
@@ -141,6 +158,7 @@ export const defaultDeps = {
   ghIssueListFeatureTitled,
   ghIssueView,
   ghPrSearchMerged,
+  ghPrSearchOpen,
   gitTagsByDate,
   gitLogGrep,
   gitIsAncestor,