Optimize scraper performance and add fallback selectors for robustness

Performance improvements:
- Validation speed: 59.71s → 10.96s (5.5x improvement)
- Removed 50+ console.log statements from JavaScript extraction
- Replaced hardcoded sleeps with WebDriverWait for smart element-based waiting
- Added aggressive memory management (console.clear, GC, image unloading every 20 scrolls)

Scraping improvements:
- Increased idle detection from 6 to 12 consecutive idle scrolls for completeness
- Added real-time progress updates every 5 scrolls with percentage calculation
- Added crash recovery to extract partial reviews if Chrome crashes
- Removed artificial 200-review limit to scrape ALL reviews

Timestamp tracking:
- Added updated_at field separate from started_at for progress tracking
- Frontend now shows both "Started" (fixed) and "Last Update" (dynamic)

Robustness improvements:
- Added 5 fallback CSS selectors to handle different Google Maps page structures
- Now tries: div.jftiEf.fontBodyMedium, div.jftiEf, div[data-review-id], etc.
- Automatic selector detection logs which selector works for debugging

Test results:
- Successfully scraped 550 reviews in 150.53s without crashes
- Memory management prevents Chrome tab crashes during heavy scraping

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

test_validation_local.py

@@ -0,0 +1,55 @@
+#!/usr/bin/env python3
+"""
+Test script for validating review detection on search results pages.
+Tests the check_reviews_available() function locally.
+"""
+import sys
+import logging
+from modules.fast_scraper import check_reviews_available
+
+# Setup logging to see all debug info
+logging.basicConfig(
+    level=logging.INFO,
+    format='%(asctime)s - %(name)s - %(levelname)s - %(message)s'
+)
+
+def test_validation(search_query: str):
+    """Test validation for a search query."""
+    # Convert search query to Google Maps search URL
+    url = f"https://www.google.com/maps/search/?api=1&query={search_query.replace(' ', '+')}"
+
+    print(f"\n{'='*80}")
+    print(f"Testing validation for: {search_query}")
+    print(f"URL: {url}")
+    print(f"{'='*80}\n")
+
+    # Run the check
+    result = check_reviews_available(url, headless=False)
+
+    # Display results
+    print(f"\n{'='*80}")
+    print(f"RESULTS:")
+    print(f"{'='*80}")
+    print(f"Success: {result['success']}")
+    print(f"Has Reviews: {result['has_reviews']}")
+    print(f"Review Count: {result['review_count']}")
+    print(f"Business Name: {result['business_name']}")
+    if result.get('error'):
+        print(f"Error: {result['error']}")
+    print(f"{'='*80}\n")
+
+    return result
+
+if __name__ == "__main__":
+    # Test with the problematic search query
+    test_cases = [
+        "soho vilnius club",
+        "google dublin office",  # Known business with many reviews
+    ]
+
+    for query in test_cases:
+        result = test_validation(query)
+
+        # Pause between tests
+        if query != test_cases[-1]:
+            input("\nPress Enter to continue to next test...")