🔧 Wave 106 Agent 5: Service Validation + Compilation Fixes
## Fixes
- trading_engine: Add missing async_queue field to PersistenceEngine::new()
- trading_engine: Fix AtomicU64 imports (remove std::sync::atomic:: prefix)
- trading_engine: Add mpsc import for AsyncAuditQueue
- api_gateway: Fix RateLimiter error handling (use anyhow::anyhow!)
## Validation Results (3/4 Services PASS)
✅ trading_service (460MB, port 50052) - Graceful PostgreSQL error
✅ backtesting_service (302MB, port 50053) - Excellent logging
✅ ml_training_service (338MB, port 50054) - Best CLI design
❌ api_gateway (port 50051) - 20 compilation errors (secrecy API)
## Documentation
- WAVE106_AGENT5_SERVICE_VALIDATION.md (comprehensive report)
- SERVICE_VALIDATION_SUMMARY.md (quick reference)
- API_GATEWAY_FIX_GUIDE.md (30-min fix instructions)
- QUICK_START_SERVICES.md (developer guide)
- scripts/offline_service_validation.sh (automated testing)
## Key Findings
- Error handling: Excellent (no panics, detailed error chains)
- Configuration: Working (env var fallbacks operational)
- Logging: Production-grade (structured tracing)
- ml_training_service: Exemplary CLI (4 subcommands, offline config validation)
## Next Steps
1. Fix api_gateway (30 minutes - secrecy API .into() conversions)
2. Deploy infrastructure (PostgreSQL, Redis, Vault)
3. Integration testing with full stack
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
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