Fixes an issue in 'monitor.sh' where the HANA backup monitoring used incorrect variable names ('HANA_USERKEY' instead of 'HANA_USER_KEY') and did not explicitly use the configured 'HDBSQL_PATH' for the 'hdbsql' command. Updates script version to 1.1.1.
Introduces a new monitoring check in 'monitor.sh' to verify the age of the last successful SAP HANA data backup. Alerts are sent if the backup age exceeds a configurable 'BACKUP_THRESHOLD_HOURS'. Updates script version to 1.1.0.