feat!: breaking change - OpenRouter models are now read from conf/openrouter_models.json while Custom / Self-hosted models are read from conf/custom_models.json

feat: Azure OpenAI / Azure AI Foundry support. Models should be defined in conf/azure_models.json (or a custom path). See .env.example for environment variables or see readme. https://github.com/BeehiveInnovations/zen-mcp-server/issues/265

feat: OpenRouter / Custom Models / Azure can separately also use custom config paths now (see .env.example )

refactor: Model registry class made abstract, OpenRouter / Custom Provider / Azure OpenAI now subclass these

refactor: breaking change: `is_custom` property has been removed from model_capabilities.py (and thus custom_models.json) given each models are now read from separate configuration files

tests/test_custom_provider.py

@@ -62,9 +62,9 @@ class TestCustomProvider:
             with pytest.raises(ValueError):
                 provider.get_capabilities("o3")
 
-            # Test with a custom model (is_custom=true)
+            # Test with a custom model from the local registry
             capabilities = provider.get_capabilities("local-llama")
-            assert capabilities.provider == ProviderType.CUSTOM  # local-llama has is_custom=true
+            assert capabilities.provider == ProviderType.CUSTOM
             assert capabilities.context_window > 0
 
         finally: