Add Sidekiq queue for Analytics

Multiple open MRs depend on this new Analytics queue in Sidekiq.
To avoid merge conflicts and duplication risk, this introduces the
queue ahead of those MRs.

config/sidekiq_queues.yml

@@ -100,6 +100,7 @@
   - [create_evidence, 2]
 
   # EE-specific queues
+  - [analytics, 1]
   - [ldap_group_sync, 2]
   - [create_github_webhook, 2]
   - [geo, 1]