Enable stateless mode on MCP HTTP transport (#265)

Author: xenobiasoft

src/backend/Sudoku.McpServer/Program.cs

@@ -17,7 +17,7 @@
 // ---------------------------------------------------------------------------
 builder.Services
     .AddMcpServer()
-    .WithHttpTransport()
+    .WithHttpTransport(options => options.Stateless = true)
     .WithTools<ApplicationInsightsTools>();
 
 builder.Services.AddHealthChecks();