Issue #1: Fixed Dockerfile path errors in ALL variants
- Main Dockerfiles already fixed by Agent 94
- Fixed 6 additional Dockerfile.dev and Dockerfile.production variants
- Root cause: docker-compose.override.yml uses .dev variants
- Changed: COPY crates/config -> COPY config (9 total files)
Issue #2: Added BENZINGA_API_KEY environment variable
- docker-compose.yml: Added fallback to demo_key_please_replace
- Backtesting Service can now start without blocking on missing API key
Issue #3: Added default CMD to ML Training Service
- services/ml_training_service/Dockerfile: Added CMD ["serve"]
- Container now starts service instead of showing help menu
All 3 Agent 96 blockers resolved. Ready for full deployment test.
Wave 125 Phase 3B - Deployment Blockers Complete
1b6b64a75e