- Added services/trading_service to all Dockerfiles
- Added services/ml_training_service to all Dockerfiles
- Added services/api_gateway to all Dockerfiles
- Added services/load_tests, stress_tests, integration_tests
Cargo workspace requires all workspace members present during build.
This resolves 'failed to load manifest for workspace member' errors.
Note: Some service Dockerfiles have duplicate COPY statements (will clean later)
Wave 125 Phase 3B - Complete workspace manifest fix