* feat(multi-region): metrics for knex for all regional databases
* improve typing in knex monitoring
* error logging around migrations
* await async calls for db connections
- add 'region' label
* add missing 'await' statements
* more missing 'await'
* guard against re-adding listeners
* It was possible for update to be called before initialize
- this change collapses both into initialize, and adds checks to ensure initialization is done before being updated for new regions
* separate back into non-exported const and rename
* align with main
* Amend order at which metrics is enabled
Iain Sproat
8197bb74a3