- Add BACKUP_STAGING_PATH + RSYNC_BIN for staging before archive
- Add cleanup_run_staging to EXIT trap to remove staging dir
- Extend test harness for staging scenarios
- Add EXCLUDED_NAMESPACES (default kube-system,kube-public,kube-node-lease,default); excluded folders are backed up but never scaled
- Use a per-run state dir via mktemp -d so stale .state files from an earlier run can't leak into restores
- Partial folder-backup failure now exits 0 (only zero successes fails); retention runs even on partial failure
- Remove dead SCALE_TIMEOUT_SECONDS config; document SCALE_WAIT_SECONDS
- Add .gitattributes to keep *.sh at LF
- Extend test harness to 44 passing assertions covering exclusions, per-run state, partial/all-failed/empty scenarios
