test: accept queued or delivered blocker receipt

tests/e2e/test_mobile_today_handoff_release.py

@@ -574,10 +574,18 @@ def test_release_artifact_recovers_admitted_blocker_after_reload_and_opens_next_
             })""")
             assert state["today"] == ["issue:acme/mobile:42:"]
             assert state["later"]["issue:acme/mobile:41:"].startswith("2099-08-19T09:00")
-            comments = [item for item in state["outbox"]["items"] if item["kind"] == "issue-comment"]
-            assert len(comments) == 1
-            assert comments[0]["number"] == 41
-            assert comments[0]["body"] == "Blocked waiting for the design owner"
+            queued_comments = [
+                item for item in state["outbox"]["items"] if item["kind"] == "issue-comment"
+            ]
+            delivered_comments = [
+                {"number": number, "body": body}
+                for number, body in fake.comments
+                if number == 41 and body == "Blocked waiting for the design owner"
+            ]
+            assert len(queued_comments) + len(delivered_comments) == 1
+            receipt = (queued_comments + delivered_comments)[0]
+            assert receipt["number"] == 41
+            assert receipt["body"] == "Blocked waiting for the design owner"
             assert page.evaluate("document.documentElement.scrollWidth <= window.innerWidth")
             assert browser_errors == []
             browser.close()