Add ability to manually run Review Descriptions from the UI / API (#24222)

* Add ability to manually run Review Descriptions from the UI / API

* Fix not handling None type for call

frigate/genai/manager.py

@@ -110,6 +110,28 @@ class GenAIClientManager:
         name = self._role_map.get(GenAIRoleEnum.embeddings)
         return self._get_client(name) if name else None
 
+    def role_info(self) -> dict[str, dict[str, Any]]:
+        """Return the model selected for each configured role and its context size.
+
+        Only reads state the client saved when it initialized, so unlike
+        list_models() this does not ask the provider for its catalog.
+        """
+        result: dict[str, dict[str, Any]] = {}
+
+        for role, name in self._role_map.items():
+            client = self._get_client(name)
+
+            if not client:
+                continue
+
+            result[role.value] = {
+                "name": name,
+                "model": self._configs[name].model,
+                "context_size": client.get_context_size(),
+            }
+
+        return result
+
     def list_models(self) -> dict[str, dict[str, Any]]:
         """Return per-entry model lists and capabilities, keyed by config entry name."""
         result: dict[str, dict[str, Any]] = {}