Weekly pg_checkup reports for container registry DB
Context
Followup from readiness!109 (comment 903223764).
Proposal
Quoting @hphilipps:
For our rails DB we create weekly pg_checkup reports (see https://console.postgres.ai/gitlab/gitlab_production/reports/) which provide valuable hints for any kind of needed DB maintenance or optimizations. We should make sure to have something similar setup for the registry DB - best would be to get the database team involved with that and clarify if they would be the owner for checking those reports and acting on them.