postgresql CB missing some columns

There appear to be a few omissions in the Postgresql CB schema:

dhcp4_option_def - missing class_id column and related constraints dhcp6_option_def - missing class_id column and related constraints

see MySQL change (similar change for dhcp4 too)

ALTER TABLE dhcp6_option_def
    ADD COLUMN class_id BIGINT UNSIGNED NULL DEFAULT NULL;

ALTER TABLE dhcp6_option_def
  ADD CONSTRAINT fk_dhcp6_option_def_client_class_id
    FOREIGN KEY (class_id)
    REFERENCES dhcp6_client_class (id)
    ON DELETE CASCADE
    ON UPDATE CASCADE;

dhcp6_client_class - missing preferred_lifetime

Need to do an audit and see if there are any other missing elements.