Recover disk space safely and complete metadata-only backup updates

usr-local-sbin/app-backup.sh

@@ -1,5 +1,5 @@
 #!/usr/bin/env bash
-# A backup is published only after every source, archive and remote readback passed.
+# A backup is published only after every source, archive and remote metadata check passed.
 set -Eeuo pipefail
 SCRIPT_DIR=$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)
 LIB_DIR="$SCRIPT_DIR/../lib/app-backup"
@@ -118,10 +118,10 @@ if [[ $ENABLE_UPLOAD == true ]]; then
   echo '-- Remote upload started (archives and manifest; completion marker withheld)'
   BACKUP_PHASE='Remote-Upload'; UPLOAD_STATUS=COPY
   rc copy "$RUN_DIR" "$remote_run" --exclude /COMPLETE --exclude /UPLOADED --immutable
-  echo '-- Remote upload finished; reading all uploaded files back for verification'
-  BACKUP_PHASE='Remote-Rückleseprüfung'; UPLOAD_STATUS=CHECK
-  remote_readback "$RUN_DIR" "$remote_run" --exclude /COMPLETE --exclude /UPLOADED
-  echo '-- Remote readback passed; publishing completion marker'
+  echo '-- Remote upload finished; checking uploaded file presence and sizes (no archive download)'
+  BACKUP_PHASE='Remote-Dateiprüfung'; UPLOAD_STATUS=CHECK
+  remote_metadata_check "$RUN_DIR" "$remote_run" --exclude /COMPLETE --exclude /UPLOADED
+  echo '-- Remote metadata check passed; publishing completion marker'
   BACKUP_PHASE='Remote-Abschlussmarker'; UPLOAD_STATUS=MARKER
   rc copyto "$RUN_DIR/COMPLETE" "$remote_run/COMPLETE" --immutable
   # Command substitution strips trailing newlines, which could accept a marker
@@ -136,7 +136,7 @@ PY
   date -u -Is > "$RUN_DIR/UPLOADED"
   sync -f "$RUN_DIR"
   UPLOAD_STATUS=VERIFIED
-  echo '-- Remote backup fully read back and verified'
+  echo '-- Remote upload confirmed (file presence, sizes and completion marker; content verification deferred to restore test)'
 fi
 
 if [[ $SKIP_RETENTION == true ]]; then