Add comment to show where the column data is comming from

Author: andyw8

test/ruby_lsp_rails/runner_client_test.rb

@@ -21,6 +21,7 @@ class RunnerClientTest < ActiveSupport::TestCase
       end
 
       test "model returns information for the requested model" do
+        # test/dummy/db/migrate/20230330202955_create_users.rb
         columns = [
           ["id", "integer"],
           ["first_name", "string"],