pgsql: Add temporal FOREIGN KEY contraints

Add temporal FOREIGN KEY contraints Add PERIOD clause to foreign key constraint definitions. This is supported for range and multirange types. Temporal foreign keys check for range containment instead of equality. This feature matches the behavior of the SQL standard temporal foreign keys, but

pgsql: Add temporal FOREIGN KEY contraints

Add temporal FOREIGN KEY contraints Add PERIOD clause to foreign key constraint definitions. This is supported for range and multirange types. Temporal foreign keys check for range containment instead of equality. This feature matches the behavior of the SQL standard temporal foreign keys, but