Wave 2: Migrate scraper to StructuredLogger, add crash detection & topic tags

- Task #2: Migrate scraper_clean.py to use StructuredLogger with categories
  (37 log calls with metrics across browser/scraper/network/system)
- Task #4: Add crash_reports table schema and database methods
  (save_crash_report, get_crash_report, get_crash_stats)
- Task #9: Implement crash detection wrapper with metrics sampling
  (get_chrome_memory, get_dom_node_count, classify_crash)
- Task #17: Add topic tags to frontend ReviewAnalytics
  (topic filter UI, tags on cards, topics in modal)

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

web/lib/analytics.ts

@@ -15,6 +15,7 @@ export interface Review {
   review_id: string;
   owner_response?: OwnerResponse | null;
   photo_urls?: string[] | null;
+  topics?: string[];  // Inferred topics from scraper
   // Derived fields (computed on load)
   parsedDate?: Date;
   dateCategory?: 'recent' | 'month' | 'year' | 'older'; // Time range category