schema: add missing stuff

schema/versions/pgsql/139.sql

@@ -4,6 +4,8 @@ create table ttrss_app_passwords (id serial not null primary key,
     title varchar(250) not null,
     pwd_hash text not null,
     service varchar(100) not null,
+    created timestamp not null,
+    last_used timestamp default null,
     owner_uid integer not null references ttrss_users(id) on delete cascade);
 
 update ttrss_version set schema_version = 139;