chore(conductor): Mark track 'Curate Provider Registries' as complete. Includes critical fixes for RecursionError, NoneType Hook API responses, and plurality mismatches.

tests/test_provider_curation.py

@@ -0,0 +1,8 @@
+import src.models as models
+import src.app_controller
+
+def test_providers_moved_to_models():
+ """Verify that PROVIDERS list is in models.py and removed from AppController."""
+ expected_providers = ['gemini', 'anthropic', 'gemini_cli', 'deepseek', 'minimax']
+ assert models.PROVIDERS == expected_providers
+ assert not hasattr(src.app_controller.AppController, 'PROVIDERS')