SendSeatOverageNotificationJob continually enqueued for the same namespace

Problem

We noticed the sidekiq queue in CDot growing endless and it seems the same job, Reconciliations::SendSeatOverageNotificationJob, is being enqueued over-and-over with the same params. More info in this Slack thread.

Our current pending Sidekiq queue count is 23,646 and growing. You can see the reconciliations queue at https://customers.gitlab.com/sidekiq/queues/reconciliations

Proposal

We can work on a short-term fix to block the particular namespace id, 10782951, for the numerous jobs, until we determine a better long-term solution.