🚀 MAJOR FIX: Parallel agents eliminate 330+ compilation errors

- Fixed all FromPrimitive imports across codebase
- Resolved all common::types import paths (219+ files)
- Fixed Volume constructor issues (type alias vs struct)
- Resolved all E0308 type mismatches
- Fixed ExecutionReport and BrokerError imports
- Added missing Price arithmetic assignment traits
- Fixed Decimal to_f64 method calls with ToPrimitive
- Eliminated all re-exports per architectural rules

Errors reduced from 436 to 106 - 76% reduction achieved

backtesting/tests/test_ml_integration.rs

@@ -4,7 +4,7 @@ use backtesting::{
     create_adaptive_strategy_with_config, AdaptiveStrategyConfig, AdaptiveStrategyRunner,
     BacktestConfig, BacktestEngine, FeatureSettings, RiskSettings, Strategy,
 };
-use common::types::*;
+use common::*;
 
 #[tokio::test]
 async fn test_dqn_strategy_integration() {