fix(monitor): Correct hdbsql command in backup monitoring

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.

monitor/monitor.sh

@@ -1,5 +1,5 @@
 #!/bin/bash
-# Version: 1.1.0
+# Version: 1.1.1
 # =============================================================================
 # SAP HANA Monitoring Script
 #
@@ -126,7 +126,7 @@ fi
 echo "ℹ️ Checking last successful data backup status..."
 
 # Query to get the start time of the most recent successful complete data backup
-last_backup_date=$(hdbsql -U "$HANA_USERKEY" -j -a -x \
+last_backup_date=$("$HDBSQL_PATH" -U "$HANA_USER_KEY" -j -a -x \
     "SELECT TOP 1 SYS_START_TIME FROM M_BACKUP_CATALOG WHERE ENTRY_TYPE_NAME = 'complete data backup' AND STATE_NAME = 'successful' ORDER BY SYS_START_TIME DESC" 2>/dev/null | tr -d "\"" | sed 's/\..*//') # sed removes fractional seconds
 
 if [[ -z "$last_backup_date" ]]; then