Rename AlchemySolidus::TouchAlchemyIngredients

If our namespace should be Alchemy::Solidus, then let's rename this
file, too.

app/decorators/models/alchemy/solidus/spree_product_decorator.rb

@@ -4,7 +4,7 @@ module Alchemy
   module Solidus
     module SpreeProductDecorator
       def self.prepended(base)
-        base.include AlchemySolidus::TouchAlchemyIngredients
+        base.include Alchemy::Solidus::TouchAlchemyIngredients
         base.has_many :alchemy_ingredients, class_name: "Alchemy::Ingredients::SpreeProduct", as: :related_object, dependent: :nullify
       end
 

app/decorators/models/alchemy/solidus/spree_taxon_decorator.rb

@@ -4,7 +4,7 @@ module Alchemy
   module Solidus
     module SpreeTaxonDecorator
       def self.prepended(base)
-        base.include AlchemySolidus::TouchAlchemyIngredients
+        base.include Alchemy::Solidus::TouchAlchemyIngredients
         base.has_many :alchemy_ingredients, class_name: "Alchemy::Ingredients::SpreeTaxon", as: :related_object, dependent: :nullify
       end
 

app/decorators/models/alchemy/solidus/spree_variant_decorator.rb

@@ -4,7 +4,7 @@ module Alchemy
   module Solidus
     module SpreeVariantDecorator
       def self.prepended(base)
-        base.include AlchemySolidus::TouchAlchemyIngredients
+        base.include Alchemy::Solidus::TouchAlchemyIngredients
         base.has_many :alchemy_ingredients, class_name: "Alchemy::Ingredients::SpreeVariant", as: :related_object, dependent: :nullify
       end
 

app/models/alchemy/solidus/touch_alchemy_ingredients.rb

@@ -0,0 +1,20 @@
+# frozen_string_literal: true
+
+module Alchemy
+  module Solidus
+    module TouchAlchemyIngredients
+      extend ActiveSupport::Concern
+
+      included do
+        after_update :touch_alchemy_ingredients
+        after_touch :touch_alchemy_ingredients
+      end
+
+      private
+
+      def touch_alchemy_ingredients
+        alchemy_ingredients.each(&:touch)
+      end
+    end
+  end
+end