Put redirect to duplicate logs path behind a feature flag

app/controllers/form_controller.rb

@@ -155,12 +155,14 @@ private
   end
 
   def successful_redirect_path
-    if @log.lettings?
-      if current_user.lettings_logs.duplicate_logs(@log).count.positive?
-        return send("lettings_log_duplicate_logs_path", @log)
+    if FeatureToggle.deduplication_flow_enabled?
+      if @log.lettings?
+        if current_user.lettings_logs.duplicate_logs(@log).count.positive?
+          return send("lettings_log_duplicate_logs_path", @log)
+        end
+      elsif current_user.sales_logs.duplicate_logs(@log).count.positive?
+        return send("sales_log_duplicate_logs_path", @log)
       end
-    elsif current_user.sales_logs.duplicate_logs(@log).count.positive?
-      return send("sales_log_duplicate_logs_path", @log)
     end
 
     if is_referrer_type?("check_answers")

app/services/feature_toggle.rb

@@ -33,4 +33,8 @@ class FeatureToggle
   def self.new_data_protection_confirmation?
     true
   end
+
+  def self.deduplication_flow_enabled?
+    !Rails.env.production?
+  end
 end