Recover backup capacity with verified adaptive retention

Resume pending publications under local pressure, allow verified offsite-only history as a final local recovery stage, and prune old complete remote sets against actual upload quota while preserving the newest verified copies. Document defaults, recovery limits and validation; add pressure and quota regression coverage.

usr-local-sbin/app-backup.sh

@@ -29,7 +29,11 @@ source "$LIB_DIR/space.sh"
 if [[ $CHECK == false || $PREPARE_SPACE == true ]]; then prepare_backup_space; fi
 preflight
 if [[ $CHECK == true ]]; then
-  echo 'Preflight passed. Directory metadata probed; no application backup, service stop or upload performed.'
+  if [[ $PREPARE_SPACE == true ]]; then
+    echo 'Space preparation and preflight passed. Pending uploads and pressure cleanup processed; no new application snapshot or service stop performed.'
+  else
+    echo 'Preflight passed. Directory metadata probed; no application backup, service stop or upload performed.'
+  fi
   exit 0
 fi
 STAGING_DIR=$(mktemp -d "$STAGING_ROOT/${RUN_ID}.XXXXXX")
@@ -113,6 +117,8 @@ sync -f "$ARCHIVE_DIR"
 echo "-- Complete local backup: $RUN_DIR"
 
 if [[ $ENABLE_UPLOAD == true ]]; then
+  BACKUP_PHASE='Remote-Platzprüfung'
+  ensure_remote_space "$(du -sb -- "$RUN_DIR" | awk '{print $1}')" "$RUN_ID"
   remote_run="${RCLONE_REMOTE_BASE%/}/$RUN_ID"
   # Upload COMPLETE last. An interrupted upload cannot look like a valid set.
   echo '-- Remote upload started (archives and manifest; completion marker withheld)'