feat: add security event taxonomy and optimize park queryset
- Add comprehensive security_event_types ChoiceGroup with categories for authentication, MFA, password, account, session, and API key events
- Include severity levels, icons, and CSS classes for each event type
- Fix park queryset optimization by using select_related for OneToOne location relationship
- Remove location property fields (latitude/longitude) from values() call as they are not actual DB columns
- Add proper location fields (city, state, country) to values() for map display
This change enhances security event tracking capabilities and resolves a queryset optimization issue where property decorators were incorrectly used in values() queries.
- Add new `/profiles/` endpoint for listing user profiles with search, filtering, and pagination support
- Implement list_profiles view with OpenAPI documentation for user discovery and leaderboards
- Refactor WebAuthn authentication state management to simplify begin_authentication flow
- Update MFA passkey login to store user reference instead of full state in cache
This enables public profile browsing and improves the passkey authentication implementation by leveraging allauth's internal session management.
