Fetch closed position to get last pnl realized

src/Managing.Infrastructure.Exchanges/Abstractions/IExchangeProcessor.cs

@@ -41,4 +41,10 @@ public interface IExchangeProcessor
     Task<Trade> GetTrade(string reference, string orderId, Ticker ticker);
     Task<List<FundingRate>> GetFundingRates();
     Task<IEnumerable<Position>> GetPositions(Account account);
+    
+    Task<List<Position>> GetPositionHistory(
+        Account account,
+        Ticker ticker,
+        DateTime? fromDate = null,
+        DateTime? toDate = null);
 }