Add new field range_parent_id on order scheme

We storage the parent order id if the new order is a
range child order

Author: grunch

models/order.js

@@ -70,6 +70,7 @@ const OrderSchema = new mongoose.Schema({
   tg_channel_message2: { type: String },
   tg_group_message1: { type: String },
   tg_group_message2: { type: String },
+  range_parent_id: { type: String }, // If the order have a parent we save the Id
   price_from_api: { type: Boolean },
   price_margin: { type: Number, default: 0 },
   admin_warned: { type: Boolean, default: false }, // We set this to true when the bot warns admins the order is about to expire