chore: Add description field in custom attribute model (#2872)

app/models/custom_attribute_definition.rb

@@ -5,6 +5,7 @@
 #  id                     :bigint           not null, primary key
 #  attribute_display_name :string
 #  attribute_display_type :integer          default("text")
+#  attribute_description  :text
 #  attribute_key          :string
 #  attribute_model        :integer          default("conversation_attribute")
 #  default_value          :integer

db/migrate/20210824152852_add_description_to_custom_attribute_definition.rb

@@ -0,0 +1,5 @@
+class AddDescriptionToCustomAttributeDefinition < ActiveRecord::Migration[6.1]
+  def change
+    add_column :custom_attribute_definitions, :attribute_description, :text
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 2021_07_23_095657) do
+ActiveRecord::Schema.define(version: 2021_08_24_152852) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "pg_stat_statements"
@@ -311,6 +311,7 @@ ActiveRecord::Schema.define(version: 2021_07_23_095657) do
     t.bigint "account_id"
     t.datetime "created_at", precision: 6, null: false
     t.datetime "updated_at", precision: 6, null: false
+    t.text "attribute_description"
     t.index ["account_id"], name: "index_custom_attribute_definitions_on_account_id"
     t.index ["attribute_key", "attribute_model"], name: "attribute_key_model_index", unique: true
   end