Maintaining the current queue size in a SQL column would require
updating the DB on every queue operation. Avoid that contention by
instead looking up the current size on the in-memory durable queue
struct, which is already tracked & updated as data enters & leaves
the queue.
* feat: sql down migrations
* refactor: different name for up migrations
* chore: update migrations ref in svc tests
* build: add lint step to verify sql migration names match
Dane Strandboge
William Baker
Daniel Moran