fix(hanatool): Improve backup notifications and bump version

hanatool.sh

@@ -1,5 +1,5 @@
 #!/bin/bash
-# Version: 1.5.3
+# Version: 1.5.4
 # ==============================================================================
 # SAP HANA Schema and Tenant Management Tool (hanatool.sh)
 #
@@ -230,10 +230,10 @@ case "$ACTION" in
                     echo "❌ Error: Failed to create archive from '${backup_target_dir}'."
                 fi
             fi
-            send_notification "✅ Tenant backup for user key '${USER_KEY}' completed successfully."
+            send_notification "✅ HANA tenant '${TENANT_NAME}' backup completed successfully."
         else
             echo "❌ Error: Failed to initiate tenant backup (hdbsql exit code: ${EXIT_CODE})."
-            send_notification "❌ Tenant backup for user key '${USER_KEY}' FAILED."
+            send_notification "❌ HANA tenant '${TENANT_NAME}' backup FAILED."
             if [[ "$COMPRESS" == "true" && "$DRY_RUN" == "false" ]]; then rm -rf "$backup_target_dir"; fi
         fi
         ;;