Improve species/color name migration performance & correctness

Oh right, this should only run in the up direction! And also we can get
a lot faster by preloading the translations.

db/migrate/20240123125509_add_name_to_species_and_color.rb

@@ -3,14 +3,18 @@ class AddNameToSpeciesAndColor < ActiveRecord::Migration[7.1]
     add_column :species, :name, :string, null: false
     add_column :colors, :name, :string, null: false
 
-    Species.find_each do |species|
+    reversible do |direction|
-      species.name = species.translation_for(:en).name
+      direction.up do
-      species.save!
+        Species.includes(:translations).find_each do |species|
-    end
+          species.name = species.translation_for(:en).name
+          species.save!
+        end
 
-    Color.find_each do |color|
+        Color.includes(:translations).find_each do |color|
-      color.name = color.translation_for(:en).name
+          color.name = color.translation_for(:en).name
-      color.save!
+          color.save!
+        end
+      end
     end
   end
 end