fix: crawler strategy exception handling and fixes

[NanmiCoder]

Bug Description：

The following code captures exceptions but is missing the variable e. If this exception occurs, the program will lack the variable e and will panic.

crawl4ai/crawl4ai/crawler_strategy.py

Lines 286 to 289 in 38044d4

	except InvalidArgumentException:
	if not hasattr(e, 'msg'):
	e.msg = sanitize_input_encode(str(e))
	raise InvalidArgumentException(f"Failed to crawl {url}: {e.msg}")

[ntohidikplay]

yes, that's correct.

[unclecode]

Thanks for collaboration