[Placeholder] Canonical article — replace before publishing

This is placeholder content, not a real post. It exists to prove Epic 2's canonical-article pipeline — schema validation, the /writing/ index, and the /writing/<slug>/ detail template — end to end with real content shape, without inventing a genuine article on the owner's behalf.

Replace this record with a real canonical article (or remove it) before the writing section is considered content-complete.