Application fully migrated to modular approach

tests/test_utils.py

@@ -28,7 +28,7 @@ class TestGTINProcessor:
         assert self.processor.normalize("abc") is None
 
         # Test short number (gets padded)
-        assert self.processor.normalize("123") == "000000000123"
+        assert self.processor.normalize("123") == "0000000000123"
 
     def test_normalize_gtin_with_formatting(self):
         """Test GTIN normalization with various formatting"""