chore(main): release 0.0.21

[cnpg-bot]

🤖 I have created a release beep boop

0.0.21 (2026-10-14)

⚠ BREAKING CHANGES

• retention: old retention policies are no longer supported. Users should apply update their PluginConfiguration resources to use the new format.
• sidecar: the PluginConfiguration CRD no longer accepts a klio-restore entry in spec.containers.
• operator: Server.spec.tier1.data, Server.spec.tier1.cache, Server.spec.tier2.cache and Server.spec.queue are removed and replaced by the required Server.spec.storage. Existing Server resources are invalid against the new CRD and must be rewritten. The old PVCs are retained but no longer used; migrating their contents into the unified volume is a manual procedure, documented in the "0.0.20 to 0.0.21" section of upgrade_notes.md.

Features

• compression: Allow configuring the Kopia compression policy (#189) (ce10e13)
• dlq: Retry failed tasks from the dead-letter queue (#167) (160b869), closes #166
• observability: Rework Grafana dashboard for multi-cluster deployments (#151) (2c67855)
• olm: Add the bundle and catalog images to the artifacts repository (#191) (1aaacd3), closes #188
• operator: Build a UBI variant of the operator image (#150) (cd24fdd)
• operator: Replace per-purpose PVCs with a single unified /klio PVC (#245) (40001ba)
• retention: Drop Kopia retention policy usage (#311) (b7c3fae), closes #168
• wal: Stream real per-block server acks for faster PostgreSQL feedback (bc1554b)

Bug Fixes

• Always wait for backups to archive WALs (#317) (d378607), closes #248
• core: Add release-please marker to core plugin version (#131) (4a3b20c), closes #130
• core: Identify Kopia snapshots by a stable identity in verify and delete (#74) (e85d21b)
• core: Support immediate backup from a replica cluster (#201) (9e06630)
• deps: Update all non-major go dependencies (#116) (5270d42)
• deps: Update all non-major go dependencies (#142) (12cd4ba)
• deps: Update all non-major go dependencies (#153) (bd1e401)
• deps: Update all non-major go dependencies (#175) (930020b)
• deps: Update all non-major go dependencies (#181) (78cb4f5)
• deps: Update all non-major go dependencies (#210) (c2d06e7)
• deps: Update all non-major go dependencies (#226) (72c5cd6)
• deps: Update all non-major go dependencies (#242) (9b3077a)
• deps: Update all non-major go dependencies (#276) (20865df)
• deps: Update all non-major go dependencies (#282) (6b858ce)
• deps: Update all non-major go dependencies (#291) (44d96ce)
• deps: Update all non-major go dependencies (#297) (aa32ee9)
• deps: Update all non-major go dependencies (#312) (c1a1a7f)
• deps: Update all non-major go dependencies (#322) (2aef97a)
• deps: Update all non-major go dependencies (#333) (3c53787)
• deps: Update all non-major go dependencies (#357) (9834de5)
• deps: Update all non-major go dependencies (#372) (72c3ace)
• deps: Update all non-major go dependencies (#395) (ea34ee7)
• deps: Update all non-major go dependencies (#404) (14d7a82)
• deps: Update github.com/cloudnative-pg/cloudnative-pg/tests digest to 497c067 (#272) (32f1435)
• deps: Update github.com/cloudnative-pg/cloudnative-pg/tests digest to 9ed54f3 (#384) (070c9ba)
• deps: Update github.com/cloudnative-pg/cloudnative-pg/tests digest to a4bb263 (#225) (432c700)
• deps: Update github.com/cloudnative-pg/cloudnative-pg/tests digest to f11b5e1 (#339) (f4fa73e)
• deps: Update github.com/jackc/pglogrepl digest to 662581b (#359) (dc53965)
• deps: Update kubernetes monorepo to v0.36.4 (#156) (a14763c)
• deps: Update kubernetes monorepo to v0.37.0 (#187) (026264c)
• deps: Update kubernetes monorepo to v0.37.1 (#321) (e10c433)
• deps: Update module github.com/aws/aws-sdk-go-v2/service/s3 to v1.113.1 (#259) (8529d7b)
• deps: Update module github.com/prometheus/common to v0.72.1 (#400) (2c5525e)
• deps: Update module sigs.k8s.io/controller-runtime to v0.25.0 (#223) (1891047)
• deps: Update module sigs.k8s.io/controller-runtime to v0.25.1 (#271) (61fa6c5)
• deps: Update module sigs.k8s.io/controller-runtime to v0.25.2 (#352) (03a15d8)
• operator: Serve recovery restore hooks from the instance pod (#196) (616578a), closes #192
• replication: Log the replication slot's real restart point after creation (9a7184e)
• sidecar: Serve backups while the cluster bootstraps (8c1a3e8), closes #268

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