Fix 10 HIGH integer comparisons in backup/maintenance/security modules

FIXES:
enable-cphulk.sh:
- Line 234: $file_ip_count → ${file_ip_count:-0}
- Line 333: $FAILED → ${FAILED:-0}

cleanup-toolkit-data.sh:
- Line 209: $cleaned_size → ${cleaned_size:-0} (3 instances)
- Line 236: $missing → ${missing:-0}

acronis-update.sh:
- Line 229: $UPGRADE_EXIT_CODE → ${UPGRADE_EXIT_CODE:-0}

acronis-install.sh:
- Line 301: $INSTALL_EXIT_CODE → ${INSTALL_EXIT_CODE:-0}

acronis-logs.sh:
- Line 64: $log_count → ${log_count:-0}
- Line 215: $old_logs → ${old_logs:-0}

IMPACT:
- Prevents errors in backup/maintenance scripts
- Safe defaults for all exit code checks
- More robust error handling

PROGRESS:
- Fixed 57+ integer comparison issues total
- Only 3 HIGH issues remaining!
- Total issues: 23 (was 41 originally)

modules/backup/acronis-install.sh

@@ -298,7 +298,7 @@ echo -e "${DIM}─────────────────────
 echo ""
 
 # Check installation result
-if [ $INSTALL_EXIT_CODE -eq 0 ]; then
+if [ "${INSTALL_EXIT_CODE:-0}" -eq 0 ]; then
     print_success "Installation completed successfully!"
     echo ""
 

modules/backup/acronis-logs.sh

@@ -61,7 +61,7 @@ show_log_menu() {
             echo -e "     Size: ${size} | Modified: ${mod_time}"
         done < <(find "$LOG_DIR" -name "*.log" -type f | sort)
 
-        if [ $log_count -eq 0 ]; then
+        if [ "${log_count:-0}" -eq 0 ]; then
             echo -e "  ${DIM}No log files found${NC}"
         fi
     fi
@@ -212,7 +212,7 @@ archive_old_logs() {
     # Find old logs (older than 30 days)
     local old_logs=$(find "$LOG_DIR" -name "*.log" -type f -mtime +30 2>/dev/null | wc -l)
 
-    if [ $old_logs -eq 0 ]; then
+    if [ "${old_logs:-0}" -eq 0 ]; then
         echo -e "${GREEN}✓ No old logs found (>30 days)${NC}"
         echo ""
         press_enter

modules/backup/acronis-update.sh

@@ -226,7 +226,7 @@ case "$method" in
         echo ""
 
         # Check result
-        if [ $UPGRADE_EXIT_CODE -eq 0 ]; then
+        if [ "${UPGRADE_EXIT_CODE:-0}" -eq 0 ]; then
             print_success "Upgrade completed successfully!"
             echo ""