F-CRIT-2 marked SHIPPED + PROVEN-LIVE: NewestArchiveTime now counts only
plausibly-complete entries (measured 1 MiB floor), verified by replaying
campaign fault 2 on demo-hp in both directions.
Files two follow-ups:
- R-99: prune never REMOVES phantoms. It does NOT count them toward keep-last
(dry-run kept 2 real + the phantom), so there is no retention/data-loss bug —
but they accumulate one per aborted upload.
- F-CRIT-1: filed READY-HIGHEST. Campaign 8's other HIGH finding, untouched by
this fix.
