The procedure AzureSQLMaintenance.txt is used for automated runbooks created in the https://github.com/uniper/uniper-terraform repository.
AzureSQLMaintenance.txt - https://techcommunity.microsoft.com/t5/azure-database-support-blog/how-to-maintain-azure-sql-indexes-and-statistics/ba-p/368787