add timestamps to drawings

src/draw/draw.service.ts

@@ -34,6 +34,7 @@ export class DrawService {
         data: data.data,
         drawingIsActive: data.drawingIsActive,
         mapdrawing: mapDrawing.identifiers[0]['mapDrawingId'],
+        timestamp: Date.now(),
       });
       await this.mapDrawHistoryRepository.insert(history);
       return mapDrawing.identifiers;
@@ -49,6 +50,7 @@ export class DrawService {
         data: data.data,
         drawingIsActive: data.drawingIsActive,
         mapdrawing: data.mapDrawingId,
+        timestamp: Date.now(),
       });
       await this.mapDrawHistoryRepository.insert(history);
       return await this.mapDrawingRepository.save(drawing);