Rewrite StringKey hashing to fix issues on .NET Framework

AI/AIRunner/TestCommandRunner.cs

@@ -99,6 +99,7 @@ public static class TestCommandRunner
             }
         }
         pb?.Dispose();
+        Console.WriteLine(); // Ensure the progress bar output is on a new line after completion
 
         var t2 = DateTime.UtcNow;
         Log.Information("{Amount} battles completed in {Duration} ms", battles, (t2 - t1).TotalMilliseconds);