Fix CA1873: guard LogWarning with IsEnabled check

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

dotnet/src/Microsoft.Agents.AI.Foundry/Hosting/AgentFrameworkResponseHandler.cs

@@ -1,10 +1,9 @@
-// Copyright (c) Microsoft. All rights reserved.
+// Copyright (c) Microsoft. All rights reserved.
 
 using System;
 using System.Collections.Generic;
 using System.Runtime.CompilerServices;
 using System.Threading;
-using System.Threading.Tasks;
 using Azure.AI.AgentServer.Responses;
 using Azure.AI.AgentServer.Responses.Models;
 using Microsoft.Extensions.AI;
@@ -151,7 +150,10 @@ public class AgentFrameworkResponseHandler : ResponseHandler
                 return agent;
             }
 
-            this._logger.LogWarning("Agent '{AgentName}' not found in keyed services. Attempting default resolution.", agentName);
+            if (this._logger.IsEnabled(LogLevel.Warning))
+            {
+                this._logger.LogWarning("Agent '{AgentName}' not found in keyed services. Attempting default resolution.", agentName);
+            }
         }
 
         // Try non-keyed default

dotnet/src/Microsoft.Agents.AI.Foundry/Hosting/InputConverter.cs

@@ -1,9 +1,8 @@
-// Copyright (c) Microsoft. All rights reserved.
+// Copyright (c) Microsoft. All rights reserved.
 
 using System;
 using System.Collections.Generic;
 using System.Diagnostics.CodeAnalysis;
-using System.Linq;
 using System.Text.Json;
 using Azure.AI.AgentServer.Responses.Models;
 using Microsoft.Extensions.AI;

dotnet/src/Microsoft.Agents.AI.Foundry/Hosting/OutputConverter.cs

@@ -1,4 +1,4 @@
-// Copyright (c) Microsoft. All rights reserved.
+// Copyright (c) Microsoft. All rights reserved.
 
 using System;
 using System.Collections.Generic;

dotnet/src/Microsoft.Agents.AI.Foundry/Hosting/ServiceCollectionExtensions.cs

@@ -1,4 +1,4 @@
-// Copyright (c) Microsoft. All rights reserved.
+// Copyright (c) Microsoft. All rights reserved.
 
 using System;
 using Azure.AI.AgentServer.Responses;