Rename ResponseRate to ResponseRateCalculator. Create a new response

rate model.  Create a loader to refresh response rates for all
subcategories.

Use precalculated response rates in views

Wrap more elements in page caching

Calculate a response rate for a subcategory if one does not already
exist

lib/tasks/data.rake

@@ -42,6 +42,17 @@ namespace :data do
       SurveyResponsesDataLoader.load_data filepath:
     end
     puts "=====================> Completed loading #{SurveyItemResponse.count} survey responses"
+
+    puts 'Refreshing response rates'
+    ResponseRateLoader.refresh
+    puts "=====================> Completed loading #{ResponseRate.count} survey responses"
+  end
+
+  desc 'refresh response rate values'
+  task refresh_response_rates: :environment do
+    puts 'Refreshing response rates'
+    ResponseRateLoader.refresh
+    puts "=====================> Completed loading #{ResponseRate.count} survey responses"
   end
 
   desc 'load admin_data'

lib/tasks/one_off.rake

@@ -51,6 +51,9 @@ namespace :one_off do
     puts "=====================> Loading data from csv at path: #{filepath}"
     SurveyResponsesDataLoader.load_data filepath: filepath
     puts "=====================> Completed loading #{SurveyItemResponse.count} survey responses"
+    puts 'Refreshing response rates'
+    ResponseRateLoader.refresh
+    puts "=====================> Completed loading #{ResponseRate.count} survey responses"
   end
 
   desc 'load winchester results for 2021-22'
@@ -61,6 +64,9 @@ namespace :one_off do
       puts "=====================> Loading data from csv at path: #{filepath}"
       SurveyResponsesDataLoader.load_data filepath:
     end
+    puts 'Refreshing response rates'
+    ResponseRateLoader.refresh
+    puts "=====================> Completed loading #{ResponseRate.count} survey responses"
   end
 
   desc 'list scales that have no survey responses'