* Brewfile for homebrew dependencies on macos
* Pull & build google-cloud-cpp/otel via bootstrap script rather than
keeping it all in the ext/ subfolder.
* Update controller CI build with new steps
Allow controllers to advertise which central version (cv1, cv2, or all)
they are assigned to handle via a new configurable field. The value is
persisted to the database on each heartbeat and validated at startup
against the DB CHECK constraint.
Required to get the list of configs for a particular org that the controller has. Named it `linked_id` rather than `org_id` since we don't know what it will be linked to in CV2
Also for pubsub trips back to CV1/CV2, rather than having 2 queues for each service (networks & members), theres now only a single queue for each change type, and `frontend = (cv1|cv2)` attribute is set on the message for filtering.
Grant Limberg