Add query for get all versions of one article

src/main/resources/sql/functions/article/find_articles_versions_by_id.sql

@@ -0,0 +1,11 @@
+create or replace function find_articles_versions_by_id(in _id uuid, out resource json) language plpgsql as
+$$
+declare
+    _version_id uuid = (select version_id from article where id = _id);
+begin
+    select find_articles_versions_by_version_id(_version_id)
+    into resource;
+end;
+$$;
+
+-- drop function if exists find_articles_versions_by_id(uuid, out json);

src/main/resources/sql/functions/article/find_articles_versions_by_version_id.sql

@@ -0,0 +1,17 @@
+create or replace function find_articles_versions_by_version_id(in _version_id uuid, out resource json) language plpgsql as
+$$
+begin
+    select json_agg(t order by t.version_number desc)
+    into resource
+    from (
+        select
+            a.*,
+            find_citizen_by_id(a.created_by_id) as created_by
+        from article as a
+        where a.version_id = _version_id
+        order by a.version_number desc
+    ) as t;
+end;
+$$;
+
+-- drop function if exists find_articles_versions_by_version_id(uuid, out json);