fix: crawler strategy exception handling and fixes (#271)

crawl4ai/crawler_strategy.py

@@ -283,7 +283,7 @@ def crawl(self, url: str, **kwargs) -> str:
                 print(f"[LOG] ✅ Crawled {url} successfully!")
 
             return html
-        except InvalidArgumentException:
+        except InvalidArgumentException as e:
             if not hasattr(e, 'msg'):
                 e.msg = sanitize_input_encode(str(e))
             raise InvalidArgumentException(f"Failed to crawl {url}: {e.msg}")