* Make Msg.priority nullable so courier doesn't have to write to it * Calculate TPS cost for messages and add them to courier queues * Fix truncate cases in SQL triggers * Fix migration to recreate trigger on msgs table * Dynamic channels: Mblox
* Make Msg.priority nullable so courier doesn't have to write to it * Calculate TPS cost for messages and add them to courier queues * Fix truncate cases in SQL triggers * Fix migration to recreate trigger on msgs table * Dynamic channels: Mblox