fix: Correct indentation errors in backend services

- Fix 2 indentation errors in domain_checker.py (lines 200, 205)
- Fix 2 indentation errors in domain_health.py (lines 412, 436, 447)
- Fix NameError in playwright_scraper.py when playwright not installed
- Add fallback type definitions for Browser, BrowserContext, Page

backend/app/services/playwright_scraper.py

@@ -42,6 +42,10 @@ try:
 except ImportError:
     PLAYWRIGHT_AVAILABLE = False
     Stealth = None
+    # Define dummy types for type hints
+    Browser = Any
+    BrowserContext = Any
+    Page = Any
     logger.warning("Playwright not installed. Stealth scraping disabled.")