fix federation structures view sql

sql/schema-extensions/002-view_federation_structures.sql

@@ -18,7 +18,7 @@ AS
              LEFT JOIN AddressPostal a on oa.addressPostal_id = a.id
              LEFT JOIN Country c ON (c.id = a.addressCountry_id)
              LEFT JOIN organization_contactpoint ocp ON ocp.organization_id = o.id
-             INNER JOIN (SELECT * FROM ContactPoint WHERE `contactType`='PRINCIPAL') cp ON cp.id = ocp.contactPoint_id
+             LEFT JOIN (SELECT * FROM ContactPoint WHERE `contactType`='PRINCIPAL') cp ON cp.id = ocp.contactPoint_id
              LEFT JOIN (
                 SELECT oar_.organization_id, CONCAT('[', GROUP_CONCAT(COLUMN_JSON(COLUMN_CREATE('id', oar_.id, 'title', oar_.title, 'date', DATE_FORMAT(oar_.date, '%Y-%m-%dT%TZ'), 'link', oar_.link))), ']') as articles
                 FROM (SELECT * FROM OrganizationArticle WHERE link is not null and link != '' ORDER BY date DESC) as oar_