fix: align ML service labels with training order

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

apps/ml-service/test_model.py

@@ -0,0 +1,15 @@
+import unittest
+
+from model import LABELS
+
+
+class ModelServiceTests(unittest.TestCase):
+    def test_labels_match_training_class_order_with_display_names(self) -> None:
+        self.assertEqual(
+            LABELS,
+            ["Bercak Daun", "Daun Sehat", "Karat Daun", "Hawar Daun"],
+        )
+
+
+if __name__ == "__main__":
+    unittest.main()