BREAKING CHANGE: Gateway no longer validates JWTs at dispatcher level. Each upstream service (MinIO, Authentik, Temporal) validates bearer tokens independently. Gateway passes Authorization header through unchanged. Changes: - Removed JWT validation from Dispatcher - Removed internal/auth JWT validator usage - Added gRPC URL scheme detection (grpc://) - Added temporal-frontend with gRPC config (returns 501 not-implemented) - All adapters now auth: required: false (services validate own tokens) - Gateway is now a transparent routing layer, not auth gateway gRPC forwarding requires grpcproxy middleware (future Phase 9). For now, gRPC clients should connect directly to temporal-frontend:7233.