Add opinion on find_article_by_id & find_articles request

create request for find_citizen_opinions_by_target_id
create fixture for opinions

src/main/resources/sql/fixtures/09-opinion.sql

@@ -0,0 +1,29 @@
+do
+$$
+declare
+    article_count int = (select count(*) from article);
+    _citizensIds uuid[] = (select array_agg(id) from citizen);
+begin
+    delete from opinion_on_article;
+    delete from opinion_list;
+
+    insert into opinion_list (id, name, target)
+    select uuid_in(md5('opinion_list'||row_number() over ())::cstring), 'Opinion'||row_number() over (), 'article'
+        from generate_series(0,20);
+
+    for i in 0..9 loop
+        insert into opinion_on_article (id, created_by_id, target_id, opinion)
+        select
+            uuid_in(md5('opinion_on_article'||rn+(article_count*i))::cstring),
+            z.id,
+            a.id,
+            uuid_in(md5('opinion_list'||((rn+i) % 5 +1))::cstring)
+        from (select *, row_number() over ()+i+5 % 5 rn from citizen) z
+        join (select *, row_number() over () rn from article) a using (rn);
+    end loop;
+
+    raise notice '% opinion inserted', (select count(*) from opinion_on_article);
+
+    raise notice 'opinions fixtures done';
+end;
+$$;