- rung 2: a prefilled, user-confirmed, editable, declinable prompt writes an
ordinary VORSORGE reminder keyed on the dose's primary antigen; the
published origin enum and reminder DTO are unchanged
- idempotent by antigen — a second confirmation re-anchors the existing
reminder rather than minting a second (WR-9 seen red on the reminder count,
reverted by content hash)
- rolling day cadence so logging the next dose re-anchors the due date through
the Phase 1 satisfy matcher; the whole loop proven through real routes
- booster prompt copy in six locales, plural-aware
