add #tenancylength to bulk upload

app/services/bulk_upload/lettings/row_parser.rb

@@ -230,6 +230,7 @@ private
       startertenancy: %i[field_8],
       tenancy: %i[field_9],
       tenancyother: %i[field_10],
+      tenancylength: %i[field_11],
       declaration: %i[field_132],
 
       age1_known: %i[field_12],
@@ -409,6 +410,7 @@ private
     attributes["startertenancy"] = field_8
     attributes["tenancy"] = field_9
     attributes["tenancyother"] = field_10
+    attributes["tenancylength"] = field_11
     attributes["declaration"] = field_132
 
     attributes["age1_known"] = field_12.present? ? 0 : 1

spec/services/bulk_upload/lettings/row_parser_spec.rb

@@ -541,5 +541,13 @@ RSpec.describe BulkUpload::Lettings::RowParser do
         expect(parser.log.tenancyother).to eql("some other tenancy")
       end
     end
+
+    describe "#tenancylength" do
+      let(:attributes) { { bulk_upload:, field_11: "2" } }
+
+      it "sets value to given free text string" do
+        expect(parser.log.tenancylength).to eq(2)
+      end
+    end
   end
 end