Please mark each item below with ( / ) if completed or ( x ) if incomplete: ( ) The acceptance criteria defined below are met. Given a system administrator using ovn-ic-nbctl,  When they invoke commands to manage Transit Routers,  Then, the tool must correctly modify the ovn-ic-nb DB and validate schema compliance.  ( ) The epics work is available in a downstream build (nightly/async or other) ( ) Test coverage is available in downstream CI if applicable ( ) All cards under the epic have been moved to Done ( ) Failed Test Plans have bugs added as children to the epic/feature.