R-CMD-check / check (push) Failing after 1m30s
Final-review followups:
1. cog_explain rendered the popyear range as raw 2-digit values
("popyear range: 19-20"), which a user could read as the years 19-20.
Added .expand_popyear() helper to format as 4-digit calendar years
(2019-2020). Pivot at 70 to handle pre-2000 vintages if the corpus
ever extends backward.
2. cog_peer_compare provenance was missing pop_range and is_ratio,
omitted from the spec-required reproducibility metadata.
cog_find_peers now stamps both as tibble attributes; cog_peer_compare
reads them through to provenance$pop_range and provenance$is_ratio.
Test coverage extended: explain test asserts the 4-digit format and
rejects the old 2-digit form; peer-compare test asserts pop_range +
is_ratio propagate end-to-end.
326 PASS / 0 FAIL.