feat(router.py): allow using .acompletion() for request prioritization

allows /chat/completion endpoint to work for request prioritization calls

docs/my-website/sidebars.js

@@ -193,12 +193,12 @@ const sidebars = {
         "vertex_ai"
       ],
     },
+    "scheduler",
     {
       type: "category",
       label: "🚅 LiteLLM Python SDK",
       items: [
         "routing",
-        "scheduler",
         "set_keys",
         "completion/token_usage",
         "sdk_custom_pricing",

litellm/router.py

@@ -654,7 +654,12 @@ class Router:
             timeout = kwargs.get("request_timeout", self.timeout)
             kwargs.setdefault("metadata", {}).update({"model_group": model})
 
-            response = await self.async_function_with_fallbacks(**kwargs)
+            if kwargs.get("priority", None) is not None and isinstance(
+                kwargs.get("priority"), int
+            ):
+                response = await self.schedule_acompletion(**kwargs)
+            else:
+                response = await self.async_function_with_fallbacks(**kwargs)
 
             return response
         except Exception as e:
@@ -1097,6 +1102,10 @@ class Router:
                 _response = await self.acompletion(
                     model=model, messages=messages, stream=stream, **kwargs
                 )
+                _response._hidden_params.setdefault("additional_headers", {})
+                _response._hidden_params["additional_headers"].update(
+                    {"x-litellm-request-prioritization-used": True}
+                )
                 return _response
             except Exception as e:
                 setattr(e, "priority", priority)