update: add cell size, height and with to JSON relaiton fiel

server/map_handler/add_new_lake.py

@@ -102,6 +102,9 @@ def cut_map(self, cursor, lake_name: str, cell_size_in_km=0.5):
             'type': 'FeatureCollection',
             'features': features,
             'tile_count': sub_div_id,  # Add the last subdivision ID as number of tiles
+            'cell_width': cell_width,
+            'cell_height': cell_height,
+            'cell_size_in_km': cell_size_in_km
         }
 
         # Add lake name to database