Add authentication improvements and search functionality

- Implement anonymous access control with ALLOW_ANONYMOUS_ACCESS env var
- Add complete password reset workflow with token-based validation
- Add username recovery functionality for better UX
- Implement full-text search API with relevance scoring and highlighting
- Add Docker compatibility improvements with permission handling and fallback storage
- Add quick stats API for real-time dashboard updates
- Improve security with proper token expiration and input validation
- Add search result pagination and navigation
- Enhance error handling and logging throughout the application

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

docker-compose.yml

@@ -40,6 +40,7 @@ services:
       FLASK_ENV: production
       DEBUG: "False"
       SECRET_KEY: ${SECRET_KEY:-change-this-secret-key-in-production}
+      ALLOW_ANONYMOUS_ACCESS: ${ALLOW_ANONYMOUS_ACCESS:-true}
 
       # Auth0 configuration (optional)
       AUTH0_DOMAIN: ${AUTH0_DOMAIN:-}