OptionalreservationsThe registry recovered sessions release into. A multi-node host passes its shared registry so a finished orphan frees the dead node's pending; the default builds one from the store's counter when present, else a throwaway process registry (release then affects nothing beyond this run, which is correct for single-node use of the sweep).
OptionalsettleFinish orphans older than this. Absent = report-only (the default; settling moves money).
Max sessions to inspect per run; enumeration resumes from the top next run.