Prune GitLab data volume backups 2026-01-01

[azul-group]

In each deployment, keep

• every backup for the last 6 months (roughly 12 backups),

• one backup per month for the 12 months before that (12 backups),

• one backup per quarter for the 12 months before that (4 backups)

• and one per year for older backups

• The dev.gitlab data volume snapshots have been pruned

• The anvildev.gitlab data volume snapshots have been pruned

• The anvilprod.gitlab data volume snapshots have been pruned

• The anvilprod.gitlab data volume snapshots have been pruned