- Add is_bot column to user_sessions with backfill from user_agent patterns
- Update analytics_daily trigger to skip bot sessions
- Recalculate 90 days of analytics_daily without bot contamination
- Replace cumulative failed_login_attempts with time-based audit_logs queries
- Switch engagement score from linear (capped at 100) to log2 scale
- Expand section_map from 9 to 17 categories (~95% traffic coverage)
- Exclude robots.txt, sitemap.xml etc from page view tracking
- Add bot filter to all overview, pages, paths, and engagement queries
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>