Organization broadcast messages
The broadcast_messages.namespace_id
column was meant to bring the broadcast_messages
feature to group-level. The column was added and never used. The column was no longer appropriate for the new cells architecture and it was removed by #398151 (closed)
The broadcast_messages
table is a cluster wide table. To replace the group broadcast functionality intended by broadcast_messages.namespace_id
we will need to make a cell local table with a foreign key referencing an Organization.