Critical CI fix: Add missing SamplingParams import in test_resolver.py

This fixes the CI failure:
NameError: name 'SamplingParams' is not defined

The test_resolver.py file needed to import SamplingParams from llama_stack.apis.inference
to resolve the CI test collection error.

tests/unit/server/test_resolver.py

@@ -9,19 +9,15 @@ import sys
 from typing import Any, Protocol
 from unittest.mock import AsyncMock, MagicMock
 
-from pydantic import BaseModel, Field
-
-from llama_stack.apis.inference import Inference
-from llama_stack.core.datatypes import (
-    Api,
-    Provider,
-    StackRunConfig,
-)
+from llama_stack.apis.inference import Inference, SamplingParams
+from llama_stack.core.datatypes import Api, Provider, StackRunConfig
 from llama_stack.core.resolver import resolve_impls
 from llama_stack.core.routers.inference import InferenceRouter
 from llama_stack.core.routing_tables.models import ModelsRoutingTable
 from llama_stack.providers.datatypes import InlineProviderSpec, ProviderSpec
 
+from pydantic import BaseModel, Field
+
 
 def add_protocol_methods(cls: type, protocol: type[Protocol]) -> None:
     """Dynamically add protocol methods to a class by inspecting the protocol."""
@@ -54,7 +50,12 @@ class SampleConfig(BaseModel):
 
 
 class SampleImpl:
-    def __init__(self, config: SampleConfig, deps: dict[Api, Any], provider_spec: ProviderSpec = None):
+    def __init__(
+        self,
+        config: SampleConfig,
+        deps: dict[Api, Any],
+        provider_spec: ProviderSpec = None,
+    ):
         self.__provider_id__ = "test_provider"
         self.__provider_spec__ = provider_spec
         self.__provider_config__ = config