New web-gateway crate with:
- JWT auth middleware with claims extraction
- REST routes proxying to gRPC: trading, risk, ML, training, backtesting,
performance, config, and hyperparameter tuning
- Proto compilation from shared tli/proto definitions
- AppState with lazy gRPC channels and WebSocket broadcast
- Axum server with CORS, tracing, and graceful shutdown
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
