Sophon main now refreshes an eligible materialized view incrementally,
appending what an append-only source added since the last refresh, a day
after the change that made every refresh a full rebuild. So the
materialized view page and the REFRESH reference no longer say recent
versions rebuild in full: they say recent versions run views as SQL jobs,
need no stable row ids and take no refresh options, and that a full or
incremental refresh depends on the version and the view's query. COPY is
described with the same "recent versions" wording.