refactor: maintain flat orders

apps/server/src/utils/parser.ts

@@ -109,6 +109,7 @@ export const parseExcel = (
     id: generateId(),
     title: sheetName,
     order: [],
+    flatOrder: [],
     entries: {},
     revision: 0,
   };
@@ -326,6 +327,7 @@ export const parseExcel = (
       event.timerType = TimerType.CountDown;
     }
     rundown.order.push(id);
+    rundown.flatOrder.push(id);
     rundown.entries[id] = event;
   });