Update UI, and Update Sitemap tool to get proper thread count

Page Importer/tests/test_sitemap_builder.py

@@ -17,6 +17,9 @@ SPEC.loader.exec_module(MODULE)
 
 
 class SitemapBuilderTests(unittest.TestCase):
+    def test_detect_default_workers_returns_at_least_one(self) -> None:
+        self.assertGreaterEqual(MODULE.detect_default_workers(), 1)
+
     def test_cleanup_run_files_deletes_generated_artifacts(self) -> None:
         with tempfile.TemporaryDirectory() as temp_dir:
             output_path = pathlib.Path(temp_dir) / "crawl.csv"