chore: ignore stale call checking for archived rooms

lib/src/room.dart

@@ -142,7 +142,9 @@ class Room {
         setState(state);
       }
     }
+    if (!isArchived) {
       startStaleCallsChecker(id);
+    }
     partial = false;
   }
 

lib/src/voip/voip_room_extension.dart

@@ -50,7 +50,7 @@ extension GroupCallUtils on Room {
       staleGroupCallsTimer.remove(roomId);
       Logs().d('stopped stale group calls checker for room $id');
     } else {
-      Logs().w('[VOIP] no stale call checker for room found');
+      Logs().d('[VOIP] no stale call checker for room found');
     }
   }