fix: update asset page result assertions and correct search term field name

tests/test_models.py

@@ -31,8 +31,8 @@ class TestAssetModel:
             "assets": [{"id": "a1"}, {"id": "a2"}],
             "size": 2,
         })
-        assert len(result.assets) == 2
-        assert result.assets[0].id == "a1"
+        assert result.page_size == 2
+        assert result.page and result.page[0].id == "a1"
 
     def test_extra_fields_allowed(self):
         """Unknown API fields must not raise ValidationError."""
@@ -62,9 +62,9 @@ class TestSearchModels:
         assert opts.limit is None
 
     def test_search_options_with_values(self):
-        opts = AzSearchOptions(searchterm="hello", limit=5)
+        opts = AzSearchOptions(searchString="hello", limit=5)
         dumped = opts.model_dump(exclude_none=True)
-        assert dumped["searchterm"] == "hello"
+        assert dumped["searchString"] == "hello"
         assert dumped["limit"] == 5
 
     def test_search_result_minimal(self):