feat: Complete simulation engine with 10 components and level validation
COMPLETE SIMULATION SYSTEM IMPLEMENTATION
## New Simulation Components (7 added):
- Database: Read/write latency, replication overhead, RPS capacity
- Cache: In-memory caching with LRU/LFU/FIFO/Random eviction policies
- Message Queue: FIFO processing, retention, backpressure, processing rate
- Microservice: Auto-scaling, resource capacity, load balancing across instances
- Monitoring/Alerting: Multi-metric alerting (latency, errors, queue size)
- Third Party Service: External API reliability, rate limiting, failure modeling
- Data Pipeline: Batch processing with 10 transformation types
## Enhanced Existing Components:
- Web Server: Fixed property naming (rpsCapacity)
- CDN: Fixed property naming (ttl)
- Load Balancer: Maintained existing functionality
- Engine: Added smart topology-based entry point detection
## Level Validation System:
- Complete pass/fail game mechanics with scoring (0-100)
- Performance validation: throughput, latency, availability, cost
- Component validation: mustInclude, mustNotInclude, minReplicas
- Detailed feedback with specific requirement failures
- Smart scoring with performance bonuses
## Frontend Integration:
- Real simulation execution (replaced mock data)
- Level information extraction from URL paths
- Rich results display with pass/fail feedback
- Automatic entry node detection from design topology
## Infrastructure Updates:
- Design Schema: Added missing properties, fixed coordinate precision (float64)
- Authentication: GitHub OAuth protection for all game routes
- Error Handling: Comprehensive validation and user feedback
- Testing: 78 tests covering all components and integration scenarios
## Technical Achievements:
- 100% simulation component coverage (10/10 components)
- Realistic performance modeling for all component types
- Discrete-event simulation with proper state management
- Production-ready code without emojis
- Comprehensive test suite with integration testing
## Breaking Changes:
- Position coordinates now use float64 for precision
- /simulate endpoint now requires authentication
- Request/response format updated for level validation
This completes the core simulation engine implementation and enables
a complete educational game experience for learning system design.
Stephanie Gredell
c7e0307f08