🔧 Fix import paths: Remove non-existent prelude module references

- Fixed 101+ files importing common::types::prelude which doesn't exist
- Changed all imports to use common::types directly
- Fixed BarEvent duplicate import in data/src/types.rs
- Aligned all imports with canonical type system in common crate

tests/framework/mocks.rs

@@ -124,10 +124,10 @@ pub struct MockMarketData {
 
 #[derive(Debug, Clone)]
 // OrderSide now imported from canonical source
-use common::types::prelude::OrderSide;
+use common::types::OrderSide;
 
 // OrderStatus now imported from canonical source
-use common::types::prelude::OrderStatus;
+use common::types::OrderStatus;
 
 impl MockTradingService {
     pub fn new() -> Self {