feat(docs): added guide about backup workloads from managed k8s

[androndo]

Summary by CodeRabbit

• Documentation
  • Added comprehensive guide for enabling and configuring the Velero addon in Kubernetes clusters, including prerequisites, step-by-step setup instructions, backup and restore workflows with CSI snapshot support, bucket configuration, and cross-cluster restore procedures.

[netlify]

👷 Deploy Preview for cozystack processing.

Name	Link
🔨 Latest commit	8a40268
🔍 Latest deploy log	https://app.netlify.com/projects/cozystack/deploys/69f9f56d98a6c80008636ea1

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 4d80b749-6ee3-4c05-89af-97f77a9bf752

📥 Commits

Reviewing files that changed from the base of the PR and between fdd8855 and 8a40268.

📒 Files selected for processing (1)

• content/en/docs/v1.3/kubernetes/backups-with-velero-addon.md

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📝 Walkthrough

Walkthrough

A new documentation page is added describing how to enable the Velero addon in a tenant Kubernetes cluster, configure it with a SeaweedFS-backed bucket, and execute backup and restore workflows using Velero CLI commands.

Changes

Velero Addon Documentation

Layer / File(s)	Summary
Documentation Structure & Overview content/en/docs/v1.3/kubernetes/backups-with-velero-addon.md (lines 1–27)	Page front matter, overview of Velero addon installation, CSI snapshot support, and prerequisites (SeaweedFS, Velero CLI, admin access).
Configuration Setup content/en/docs/v1.3/kubernetes/backups-with-velero-addon.md (lines 28–113)	Step-by-step guide to create a Bucket resource, extract credentials, and deploy the tenant Kubernetes resource with nested addons.velero.valuesOverride.velero configuration (S3 endpoint, region, snapshot locations).
Verification & Workflows content/en/docs/v1.3/kubernetes/backups-with-velero-addon.md (lines 114–168)	Verification commands for backup storage location status, demo backup creation with velero backup create --snapshot-move-data, and namespace restore using velero restore create.
Cross-Cluster Patterns & References content/en/docs/v1.3/kubernetes/backups-with-velero-addon.md (lines 169–175)	Notes on restore behavior across multiple tenant clusters sharing the same bucket and related documentation links.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Poem

🐰 A velero guide, hopped into place,
With snapshots and buckets at quickening pace,
From backup to restore, a fuzzy-eared cheer,
Your data now safe, crystal clear! 🎉

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately describes the main change: adding documentation about backup workflows using the Velero addon for managed Kubernetes clusters.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch backup-for-managed-k8s

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[gemini-code-assist]

Code Review

This pull request introduces a new documentation guide for using the Velero addon to perform backups and migrations between tenant Kubernetes clusters using SeaweedFS buckets. The review feedback identifies a missing configuration parameter (deployNodeAgent: true) necessary for data movement, corrects grammatical errors and a missing Hugo shortcode closing tag, and suggests removing redundant instructions in the deployment section.