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This PR adds a new
clickhouse_backuprole and playbook to create native ClickHouse database backups and upload them to remote storage using the existingstorage_backupsrole.The implementation is designed to work with Docker-based ClickHouse clusters while keeping native package installations supported as a secondary deployment mode. For Docker deployments, it writes the allowed backup disk configuration under
{{ CLICKHOUSE_BASE_DIR }}/config.d, stores backup artifacts in{{ CLICKHOUSE_DATA_DIR }}/backupson the host, and recreates the container throughdocker composewhen the backup disk configuration changes.The role discovers databases automatically or accepts an explicit list, creates one backup artifact per database, uploads the files to S3 or Azure, and cleans up temporary artifacts after upload.