add stake orders list

app/models/stake_order.rb

@@ -0,0 +1,30 @@
+# frozen_string_literal: true
+
+# == Schema Information
+#
+# Table name: stake_orders
+#
+#  id         :bigint           not null, primary key
+#  amount     :decimal(20, 10)  default(0.0), not null
+#  pool_name  :string           not null
+#  status     :string           not null
+#  created_at :datetime         not null
+#  updated_at :datetime         not null
+#  user_id    :bigint           not null
+#
+# Indexes
+#
+#  index_stake_orders_on_user_id  (user_id)
+#
+# Foreign Keys
+#
+#  fk_rails_...  (user_id => users.id)
+#
+class StakeOrder < ApplicationRecord
+  include Processable
+
+  belongs_to :user
+
+  validates :pool_name, presence: true
+  validates :amount, presence: true
+end