add DepositOrder model and query

app/graphql/types/deposit_order_type.rb

@@ -0,0 +1,16 @@
+# frozen_string_literal: true
+module Types
+  class DepositOrderType < Types::BaseObject
+    implements GraphQL::Types::Relay::Node
+    global_id_field :id
+
+    graphql_name "DepositOrder"
+
+    field :id, ID, null: false
+    field :status, String, null: false
+    field :received_amount_cents, Integer, null: false
+    field :paid_amount_cents, Integer, null: false
+    field :created_at, GraphQL::Types::ISO8601DateTime, null: false
+    field :updated_at, GraphQL::Types::ISO8601DateTime, null: false
+  end
+end

app/graphql/types/query_type.rb

@@ -31,5 +31,10 @@ module Types
 
       ransack(scope, filter)
     end
+
+    field :deposit_orders, DepositOrderType.connection_type, null: false
+    def deposit_orders
+      Pundit.policy_scope(current_user, DepositOrder)
+    end
   end
 end