Add a regression test for the object-literal case

walkConsumed() already handles a callback nested inside an
ObjectExpression, added alongside the array/spread fix, but nothing
exercised that branch. Add a test, and confirm it fails when the
branch is disabled.

Assisted-by: Claude Code:claude-sonnet-5

Author: Jae-Hyuk-Jang

packages/lint/src/tests/outbox-listener-delivery-required.test.ts

@@ -1198,6 +1198,28 @@ federation
   }),
 );
 
+test(
+  `${ruleName}: ✅ Good - awaited callback nested inside an object literal property`,
+  lintTest({
+    code: `
+import { Activity } from "@fedify/vocab";
+
+federation
+  .setOutboxListeners("/users/{identifier}/outbox")
+  .on(Activity, async (ctx, activity) => {
+    const sender = { identifier: ctx.identifier };
+    await Promise.all(
+      Object.values({
+        a: inboxes.map((inbox) => ctx.sendActivity(sender, inbox, activity)),
+      }),
+    );
+  });
+`,
+    rule,
+    ruleName,
+  }),
+);
+
 test(
   `${ruleName}: ✅ Good - callback passed to a bare forEach that is never awaited`,
   lintTest({