- Triggered by Geo::VerificationCronWorker every minute
- The work is done by Geo::VerificationBatchWorker
- Reuses LimitedCapacity::Worker concern
- Concurrent workers do not pick up the same records
- Fixes a bug in LimitedCapacity::Worker so it passes the job args
- To do: Killed jobs can cause stuck "started" records. A follow up MR
  is in progress.