- Introduced reusable test utilities in `backend/tests/utils` for FSM transitions, HTMX interactions, and common scenarios.
- Added factory functions for creating test submissions, parks, rides, and photo submissions.
- Implemented assertion helpers for verifying state changes, toast notifications, and transition logs.
- Created comprehensive state machine diagrams for all FSM-enabled models in `docs/STATE_DIAGRAMS.md`, detailing states, transitions, and guard conditions.
- Created comprehensive documentation structure
- Added productContext.md for product understanding
- Added activeContext.md for current development status
- Added systemPatterns.md for architecture patterns
- Added developmentWorkflow.md for process standards
- Added operationalContext.md for runtime details
- Added projectBoundaries.md for technical constraints
- Added techContext.md for technology stack
- Documented all major aspects of the system
- Established foundation for maintaining context
