feat: mark Web Push updates read (Closes #561)

src/push_notifications.py

@@ -103,6 +103,7 @@ async def dispatch_unread_updates(
                             "body": "Tap to review it in Stackchain.",
                             "route": f"#/my-work/update/{thread_id}",
                             "tag": f"stackchain-update-{thread_id}",
+                            "notification_id": thread_id,
                         },
                         separators=(",", ":"),
                     )