Increase wait time to 3 seconds after Named Pipe detection

Author: yotsuda

.github/workflows/cross-platform-test.yml

@@ -336,8 +336,8 @@ jobs:
             Write-Host "Named Pipe ready after $($i * 500)ms"
             
             # Wait additional time to ensure server is fully ready for connections
-            Write-Host "Waiting additional 2 seconds for server to be ready..."
-            Start-Sleep -Seconds 2
+            Write-Host "Waiting additional 3 seconds for server to be ready..."
+            Start-Sleep -Seconds 3
             
             # Debug: Show pipe details
             if ($IsWindows) {