Don't show Station Event announcements to players in the lobby. (#30886)

* Don't show Station Event announcements to players in the lobby.

* fix pr

---------

Co-authored-by: metalgearsloth <comedian_vs_clown@hotmail.com>

Content.Server/GameTicking/GameTicker.Lobby.cs

@@ -179,5 +179,11 @@ namespace Content.Server.GameTicking
             // update server info to reflect new ready count
             UpdateInfoText();
         }
+
+        public bool UserHasJoinedGame(ICommonSession session)
+            => UserHasJoinedGame(session.UserId);
+
+        public bool UserHasJoinedGame(NetUserId userId)
+            => PlayerGameStatuses[userId] == PlayerGameStatus.JoinedGame;
     }
 }