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_docker_chrome.py

@@ -0,0 +1,57 @@
+#!/usr/bin/env python3
+"""
+Test script to verify Chrome + fast_scraper works inside Docker container.
+"""
+import sys
+sys.path.insert(0, '/app')
+
+from modules.fast_scraper import fast_scrape_reviews
+
+def test_chrome_in_container():
+    """Test Chrome with fast_scraper in container"""
+    print("=" * 70)
+    print("Testing Chrome + Fast Scraper in Docker Container")
+    print("=" * 70)
+
+    # Known good URL
+    url = "https://www.google.com/maps/place/Soho+Club/data=!4m7!3m6!1s0x46dd947294b213bf:0x864c7a232527adb4!8m2!3d54.67869!4d25.2667181!16s%2Fg%2F1thhj5ml!19sChIJvxOylHKU3UYRtK0nJSN6TIY?authuser=0&hl=es&rclk=1"
+
+    print("\nRunning fast_scrape_reviews()...")
+    print("-" * 70)
+
+    try:
+        result = fast_scrape_reviews(url=url, headless=False, max_scrolls=30)
+
+        print("\n" + "=" * 70)
+        if result['success'] and result['count'] > 0:
+            print("✅ SUCCESS! Container scraping works!")
+            print("=" * 70)
+            print(f"Reviews scraped: {result['count']}")
+            print(f"Time: {result['time']:.1f}s")
+            print(f"Speed: {result['count']/result['time']:.1f} reviews/sec")
+
+            print(f"\nFirst 3 reviews:")
+            for i, review in enumerate(result['reviews'][:3], 1):
+                author = review.get('author', 'N/A')
+                rating = review.get('rating', 'N/A')
+                print(f"{i}. {author} - {rating}⭐")
+
+            print("\n✅ Container is production-ready!")
+            return True
+        else:
+            print("⚠️  Scraping didn't work as expected")
+            print("=" * 70)
+            print(f"Success: {result['success']}")
+            print(f"Reviews: {result['count']}")
+            print(f"Error: {result.get('error', 'None')}")
+            return False
+
+    except Exception as e:
+        print(f"\n❌ Test failed: {e}")
+        import traceback
+        traceback.print_exc()
+        return False
+
+if __name__ == "__main__":
+    success = test_chrome_in_container()
+    sys.exit(0 if success else 1)