Includes logic to persist namespace statistics

- Add two new ActiveRecord models:
  - RootNamespaceStoragestatistics will persist root namespace statistics
  - NamespaceAggregationSchedule will save information when a new update
to the namespace statistics needs to be scheduled
- Inject into UpdateProjectStatistics concern a new callback that will
call an async job to insert a new row onto NamespaceAggregationSchedule
table
- When a new row is inserted a new job is scheduled. This job will
update call an specific service to update the statistics and after that
it will delete thee aggregated scheduled row
- The RefresherServices makes heavy use of arel to build composable
queries to update Namespace::RootStorageStatistics attributes.
- Add an extra worker to traverse pending rows on
NAmespace::AggregationSchedule table and schedule a worker for each one
of this rows.
- Add an extra worker to traverse pending rows on
NAmespace::AggregationSchedule table and schedule a worker for each one
of this rows

1 files changed, 1 insertions, 0 deletions

diff --git a/config/sidekiq_queues.yml b/config/sidekiq_queues.yml
index 25fd65d8644..80791795390 100644
--- a/config/sidekiq_queues.yml
+++ b/config/sidekiq_queues.yml
@@ -94,6 +94,7 @@
   - [migrate_external_diffs, 1]
   - [update_project_statistics, 1]
   - [phabricator_import_import_tasks, 1]
+  - [update_namespace_statistics, 1]
 
   # EE-specific queues
   - [ldap_group_sync, 2]