pub fn is_date_shaped(s: &str) -> boolExpand description
Does s match the shape a Date-typed metadata value must have —
YYYY-MM-DD or the ISO-8601 datetime form YYYY-MM-DDTHH:MM:SSZ?
Single source of truth for the date-shape check, shared by the CRUD
write path (parse_metadata_value) and the archive-ingress strict
validator (crate::validator::strict::value_matches_type). Keeping
one regex means the value a memstead_create accepts and the value an
import re-accepts cannot drift apart.