Fetch closed position to get last pnl realized

src/Managing.Infrastructure.Exchanges/Exchanges/BaseProcessor.cs

@@ -42,5 +42,11 @@ namespace Managing.Infrastructure.Exchanges.Exchanges
         public abstract Task<Trade> GetTrade(string reference, string orderId, Ticker ticker);
         public abstract Task<List<FundingRate>> GetFundingRates();
         public abstract Task<IEnumerable<Position>> GetPositions(Account account);
+        
+        public abstract Task<List<Position>> GetPositionHistory(
+            Account account,
+            Ticker ticker,
+            DateTime? fromDate = null,
+            DateTime? toDate = null);
     }
 }