feat: remove the 10,000-character article body limit and make the New article body optional

features/integration.qa.md

@@ -28,7 +28,7 @@ Catalogue spec (pure data, no mount, imports web/src/data/apiCatalogue.ts):
    - invite: id, kind, email, status, created_at, expires_at;
    - settings: version.
    Any other key fails the spec. "images" and "status" are explicitly rejected on articles.
-5. Request-body tables equal the validate tags (title 3-200, body max 10000, filename, keep_id,
+5. Request-body tables equal the validate tags (title 3-200, body optional with no length limit, filename, keep_id,
    merge_ids, display_name, email). The multipart field is "file". Query tables: `format` on every
    article route, and q, hash, cursor, filter, sort, limit on GET /v1/media/.
 6. The three invite routes carry "Owner only", a 403 "Only the owner can do this." caption and the