refactor(model_scanner): normalize path comparisons for model roots

fix(example_images_download_manager): re-raise specific exception on download error

refactor(usage_stats): define constants locally to avoid conditional imports

test(example_images_download_manager): update exception handling in download tests

test(example_images_file_manager): differentiate between os.startfile and subprocess.Popen in tests

test(example_images_paths): ensure valid example images root with single-library mode

test(usage_stats): use string literals for metadata payload to avoid conditional imports

py/utils/example_images_download_manager.py

@@ -202,6 +202,11 @@ class DownloadManager:
                 )
 
                 snapshot = self._progress.snapshot()
+            except ExampleImagesDownloadError:
+                # Re-raise our own exception types without wrapping
+                self._is_downloading = False
+                self._download_task = None
+                raise
             except Exception as e:
                 self._is_downloading = False
                 self._download_task = None

py/utils/usage_stats.py

@@ -13,9 +13,19 @@ from ..services.service_registry import ServiceRegistry
 # Check if running in standalone mode
 standalone_mode = os.environ.get("LORA_MANAGER_STANDALONE", "0") == "1" or os.environ.get("HF_HUB_DISABLE_TELEMETRY", "0") == "0"
 
+# Define constants locally to avoid dependency on conditional imports
+MODELS = "models"
+LORAS = "loras"
+
 if not standalone_mode:
     from ..metadata_collector.metadata_registry import MetadataRegistry
-    from ..metadata_collector.constants import MODELS, LORAS
+    # Import constants from metadata_collector to ensure consistency, but we have fallbacks defined above
+    try:
+        from ..metadata_collector.constants import MODELS as _MODELS, LORAS as _LORAS
+        MODELS = _MODELS
+        LORAS = _LORAS
+    except ImportError:
+        pass  # Use the local definitions
 
 logger = logging.getLogger(__name__)