feat: remove temporary institution amendment record after saving changes

CompanyManagment.EFCore/Repository/InstitutionContractRepository.cs

@@ -2938,6 +2938,8 @@ public class InstitutionContractRepository : RepositoryBase<long, InstitutionCon
             institutionContract.ContractingPartyId,
             institutionContract.id
             );
+        
+        await _institutionAmendmentTemp.DeleteOneAsync(x=>x.Id == amendmentTemp.Id);
         await _context.SaveChangesAsync();
 
     }