cloudnative-pg/plugin-barman-cloud — reverse-engineered prompt

Build me a CloudNativePG plugin that lets PostgreSQL clusters running on Kubernetes use Barman Cloud for backups and recovery.

I want it to feel like a real CNPG component, not a separate random tool. It should expose the backup and restore features CloudNativePG users would expect, work cleanly with cluster configuration, and make it easy to send backups to cloud object storage and recover from them when needed. Please include the plugin side, the Kubernetes manifests or config needed to run it, and enough API and validation so it feels production ready.

It should be written in Go and fit naturally into the CloudNativePG ecosystem. Add sensible tests, basic docs, and example usage so someone can understand how to install it and use it for backup and recovery flows. If there are any details missing here, look up the current CloudNativePG and plugin docs online and follow the normal patterns they use.