Read a filesystem once where two probes were answering the same question

Arrs_Stack/arr_download_orphan_cleaner.sh

@@ -354,8 +354,7 @@ for arr in sonarr radarr lidarr; do
             big_unknown=$((big_unknown + 1))
         done < <(find "$entry" -type f -size +"${min_mb}"M 2>/dev/null)
 
-        size_mb=$(du -sm "$entry" 2>/dev/null | cut -f1)
-        size_mb=${size_mb:-0}
+        size_mb=$(dir_size_mb "$entry") || size_mb=0
 
         if [[ "$has_media" == false ]] && (( big_unknown > 0 )); then
             warn "  no recognised media, but $big_unknown large file(s) of unknown type — holding: $base"