fix(types): resolve pre-existing basedpyright errors in tests

Fix ~790 basedpyright errors across the test suite:
- Type stub subclasses of real production classes with super().__init__()
- Add missing generic type arguments and Dict[str, Any] annotations
- Add None guards before subscript/member access
- Adapt tests to production API changes (removed dead handlers,
  PersistentModelCache.get_default, _i18n_filter_added location)

tests/services/test_sui_image_params_parser.py

@@ -8,6 +8,8 @@ from py.recipes.parsers import SuiImageParamsParser
 class TestSuiImageParamsParser:
     """Test cases for SuiImageParamsParser."""
 
+    parser: SuiImageParamsParser = SuiImageParamsParser()
+
     def setup_method(self):
         """Set up test fixtures."""
         self.parser = SuiImageParamsParser()
@@ -116,6 +118,7 @@ class TestSuiImageParamsParser:
         result = await self.parser.parse_metadata(metadata_str)
 
         loras = result.get('loras')
+        assert isinstance(loras, list)
         assert len(loras) == 1
         assert loras[0]['type'] == 'lora'
         assert loras[0]['name'] == 'test_lora'
@@ -142,6 +145,7 @@ class TestSuiImageParamsParser:
         result = await self.parser.parse_metadata(metadata_str)
 
         loras = result.get('loras')
+        assert isinstance(loras, list)
         assert len(loras) == 1
         assert loras[0]['type'] == 'lora'