refactor: enhance error logging and add installment amount to institution contract view model

CompanyManagment.App.Contracts/InstitutionContract/GetInstitutionContractListItemsViewModel.cs

@@ -91,6 +91,11 @@ public class GetInstitutionContractListItemsViewModel
     public bool IsInPersonContract { get; set; }
     
     public bool IsOldContract { get; set; }
+
+    /// <summary>
+    /// مبلغ قسط
+    /// </summary>
+    public double InstallmentAmount { get; set; }
 }
 
 public class InstitutionContractListWorkshop