Add record not found rescue_from

lib/shotengai/controller/base.rb

@@ -60,7 +60,11 @@ module Shotengai
       rescue_from ActiveRecord::RecordInvalid do |e|
         render json: { error: e.message }, status: 400
       end
-      
+
+      rescue_from ActiveRecord::RecordNotFound do |e|
+        render json: { error: e.message }, status: 404
+      end
+
       rescue_from AASM::InvalidTransition do |e|
         render json: { error: e.message }, status: 400
       end