improve namespacing of classes

app/components/bulk_upload_error_row_component.rb

@@ -22,9 +22,9 @@ class BulkUploadErrorRowComponent < ViewComponent::Base
   def question_for_field(field)
     case bulk_upload.log_type
     when "lettings"
-      BulkUpload::LettingsValidator.question_for_field(field.to_sym)
+      BulkUpload::Lettings::Validator.question_for_field(field.to_sym)
     when "sales"
-      BulkUpload::SalesValidator.question_for_field(field.to_sym)
+      BulkUpload::Sales::Validator.question_for_field(field.to_sym)
     else
       "Unknown question"
     end

app/services/bulk_upload/lettings/validator.rb

@@ -1,6 +1,6 @@
 require "csv"
 
-class BulkUpload::LettingsValidator
+class BulkUpload::Lettings::Validator
   include ActiveModel::Validations
 
   QUESTIONS = {

app/services/bulk_upload/sales/validator.rb

@@ -1,4 +1,4 @@
-class BulkUpload::SalesValidator
+class BulkUpload::Sales::Validator
   QUESTIONS = {
     field_1: "What is the purchaser code?",
     field_2: "What is the day of the sale completion date? - DD",

spec/services/bulk_upload/lettings/validator_spec.rb

@@ -1,6 +1,6 @@
 require "rails_helper"
 
-RSpec.describe BulkUpload::LettingsValidator do
+RSpec.describe BulkUpload::Lettings::Validator do
   subject(:validator) { described_class.new(bulk_upload:, path:) }
 
   let(:bulk_upload) { create(:bulk_upload) }