chore(main): release v2.28.0

[github-actions]

Storage Box API Experimental

This release adds support for the Storage Box API.

The Storage Box integration will be introduced as an experimental feature. This experimental phase is expected to last until 21 November 2025. During this period, upcoming minor releases of the project may include breaking changes to features related to the Storage Box API.

This release includes all changes from the recent Storage Box API changelog entry.

Examples

result, _, err := client.StorageBox.Create(ctx, hcloud.StorageBoxCreateOpts{
	Name:           "my-storage-box",
	StorageBoxType: &hcloud.StorageBoxType{Name: "bx11"},
	Location:       &hcloud.Location{Name: "fsn1"},
	Password:       "my-secure-password",
	SSHKeys: []*hcloud.SSHKey{{ PublicKey: "ssh-rsa AAAAB3NzaC1yc2E..." }},
	Labels:         map[string]string{"key": "value"},
	AccessSettings: &hcloud.StorageBoxCreateOptsAccessSettings{
		ReachableExternally: hcloud.Ptr(true),
		SSHEnabled:          hcloud.Ptr(true),
	},
})

err = client.Action.WaitFor(ctx, result.Action)

Features

• retrieve a server or load balancer network attachment (feat: retrieve a server or load balancer network attachment #750)
• add support for Storage Boxes (feat: add support for Storage Boxes #684)

Bug Fixes

• deprecate firewall_already_removed error code (fix: deprecate firewall_already_removed error code #748)
• invalid property in network add_subnet request body (fix: invalid property in network add_subnet request body #751)

---

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Release Notes

Prefix / Start

This will be added to the start of the release notes.

### Storage Box API Experimental

This release adds support for the [Storage Box API](https://docs.hetzner.cloud/reference/hetzner#storage-boxes).

The Storage Box integration will be introduced as an **experimental** feature. This experimental phase is expected to last until **21 November 2025**. During this period, upcoming minor releases of the project may include breaking changes to features related to the Storage Box API.

This release includes all changes from the recent [Storage Box API changelog](https://docs.hetzner.cloud/changelog#2025-10-21-storage-box-api-update) entry.

#### Examples

```go
result, _, err := client.StorageBox.Create(ctx, hcloud.StorageBoxCreateOpts{
	Name:           "my-storage-box",
	StorageBoxType: &hcloud.StorageBoxType{Name: "bx11"},
	Location:       &hcloud.Location{Name: "fsn1"},
	Password:       "my-secure-password",
	SSHKeys: []*hcloud.SSHKey{{ PublicKey: "ssh-rsa AAAAB3NzaC1yc2E..." }},
	Labels:         map[string]string{"key": "value"},
	AccessSettings: &hcloud.StorageBoxCreateOptsAccessSettings{
		ReachableExternally: hcloud.Ptr(true),
		SSHEnabled:          hcloud.Ptr(true),
	},
})

err = client.Action.WaitFor(ctx, result.Action)
```

Suffix / End

This will be added to the end of the release notes.