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

providers/azure_registry.py

@@ -0,0 +1,45 @@
+"""Registry loader for Azure OpenAI model configurations."""
+
+from __future__ import annotations
+
+import logging
+
+from .model_registry_base import CAPABILITY_FIELD_NAMES, CustomModelRegistryBase
+from .shared import ModelCapabilities, ProviderType, TemperatureConstraint
+
+logger = logging.getLogger(__name__)
+
+
+class AzureModelRegistry(CustomModelRegistryBase):
+    """Load Azure-specific model metadata from configuration files."""
+
+    def __init__(self, config_path: str | None = None) -> None:
+        super().__init__(
+            env_var_name="AZURE_MODELS_CONFIG_PATH",
+            default_filename="azure_models.json",
+            config_path=config_path,
+        )
+        self.reload()
+
+    def _extra_keys(self) -> set[str]:
+        return {"deployment", "deployment_name"}
+
+    def _provider_default(self) -> ProviderType:
+        return ProviderType.AZURE
+
+    def _default_friendly_name(self, model_name: str) -> str:
+        return f"Azure OpenAI ({model_name})"
+
+    def _finalise_entry(self, entry: dict) -> tuple[ModelCapabilities, dict]:
+        deployment = entry.pop("deployment", None) or entry.pop("deployment_name", None)
+        if not deployment:
+            raise ValueError(f"Azure model '{entry.get('model_name')}' is missing required 'deployment' field")
+
+        temp_hint = entry.get("temperature_constraint")
+        if isinstance(temp_hint, str):
+            entry["temperature_constraint"] = TemperatureConstraint.create(temp_hint)
+
+        filtered = {k: v for k, v in entry.items() if k in CAPABILITY_FIELD_NAMES}
+        filtered.setdefault("provider", ProviderType.AZURE)
+        capability = ModelCapabilities(**filtered)
+        return capability, {"deployment": deployment}