refactor(scraper): optimize URL validation and filter performance

- Replace validators library with built-in urlparse for URL validation
- Optimize filter statistics update logic for better performance
- Add performance benchmarking suite for filters
- Add execution time tracking to scraper examples
- Update gitignore with windsurfrules

BREAKING CHANGE: Removed dependency on validators library for URL validation

.gitignore

@@ -227,4 +227,7 @@ tree.md
 .do
 /plans
 .codeiumignore
-todo/
+todo/
+
+# windsurf rules
+.windsurfrules