fix: Update pipe path handling for cross-platform compatibility in ChildWorker and PipeName

CommIpc/PipeName.cs

@@ -1,4 +1,5 @@
 using System.Diagnostics;
+using System.Runtime.InteropServices;
 
 namespace CommIpc;
 
@@ -14,7 +15,10 @@ public static class PipeName
     }
 
     /// <summary>
-    /// Helpful for logs / debugging.
+    /// Returns the full pipe path for the current platform.
+    /// Windows: \\.\pipe\{pipeName}
+    /// Unix/macOS: /tmp/CoreFxPipe_{pipeName}
     /// </summary>
-    public static string Describe(string pipeName) => $"\\\\.\\pipe\\{pipeName}";
+    public static string Describe(string pipeName) =>
+        RuntimeInformation.IsOSPlatform(OSPlatform.Windows) ? $"\\\\.\\pipe\\{pipeName}" : $"/tmp/CoreFxPipe_{pipeName}";
 }