add referral to bulk upload

app/services/bulk_upload/lettings/row_parser.rb

@@ -285,6 +285,8 @@ private
       cbl: %i[field_75],
       chr: %i[field_76],
       cap: %i[field_77],
+
+      referral: %i[field_78],
     }
   end
 
@@ -413,6 +415,8 @@ private
     attributes["cap"] = cap
     attributes["letting_allocation_unknown"] = letting_allocation_unknown
 
+    attributes["referral"] = field_78
+
     attributes
   end
 

spec/services/bulk_upload/lettings/row_parser_spec.rb

@@ -114,6 +114,8 @@ RSpec.describe BulkUpload::Lettings::RowParser do
             field_75: "1",
             field_76: "2",
             field_77: "2",
+
+            field_78: "2",
           }
         end