fix(security): change ErrorRendererFactory isDebugMode default to false

Change the default value of $isDebugMode constructor parameter from
true to false, following the security-by-default principle. This ensures
that even if the factory is instantiated without explicit debug mode
configuration, it won't leak sensitive debugging information like
stack traces, file paths, and code context.

src/Framework/ExceptionHandling/ErrorRendererFactory.php

@@ -20,7 +20,7 @@ final readonly class ErrorRendererFactory
         private ExecutionContext $executionContext,
         private Engine $engine,
         private ?ConsoleOutput $consoleOutput = null,
-        private bool $isDebugMode = true
+        private bool $isDebugMode = false
     ) {}
 
     /**