pagination for backtest and optimization

src/Managing.Application.Abstractions/Repositories/IBacktestRepository.cs

@@ -8,6 +8,7 @@ public interface IBacktestRepository
     void InsertBacktestForUser(User user, Backtest result);
     IEnumerable<Backtest> GetBacktestsByUser(User user);
     IEnumerable<Backtest> GetBacktestsByRequestId(string requestId);
+    (IEnumerable<Backtest> Backtests, int TotalCount) GetBacktestsByRequestIdPaginated(string requestId, int page, int pageSize);
     Backtest GetBacktestByIdForUser(User user, string id);
     void DeleteBacktestByIdForUser(User user, string id);
     void DeleteBacktestsByIdsForUser(User user, IEnumerable<string> ids);