Add debug logging to issue-label handler

Log the webhook action and labels to diagnose why label events are
being ignored.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/handlers/issue-label.ts

@@ -22,6 +22,8 @@ export function issueLabel(config: Config, queue: TaskQueue) {
   return async (c: Context) => {
     const event = await c.req.json<IssueEvent>();
 
+    console.log(`[issue-label] action="${event.action}" issue=#${event.issue.number} labels=[${event.issue.labels.map((l) => l.name).join(", ")}]`);
+
     if (event.action !== "label_updated" && event.action !== "labeled") {
       return c.text("ignored: not a label event", 200);
     }