fix database API compatibility

[jewei]

The CLI still used the deprecated schemas relationship for database cluster requests. Laravel Cloud rejects these requests because the accepted include is databases.

The database restore request also used the obsolete plural /restores endpoint. This route returned the Laravel Cloud HTML page with HTTP 200 instead of an API response. The current API uses the singular /restore endpoint.

This change:

• uses include=databases for all database cluster requests
• uses the current singular database restore endpoint
• adds feature tests for cluster list, cluster delete, and restore creation
• covers restore creation with a cluster ID and with automatic cluster resolution

A live point-in-time restore completed the request successfully and returned a new cluster with restoring status.

API reference: https://laravel.com/cloud/docs/api/database-restores/create-a-database-restore

Tests

• vendor/bin/pest tests/Feature/DatabaseClusterDeleteTest.php tests/Feature/DatabaseClusterListTest.php tests/Feature/DatabaseRestoreCreateTest.php
• vendor/bin/pint --test
• vendor/bin/phpstan analyse --no-progress

[michaelfromtheoutfit]

Confirming this reproduces on a clean v0.5.2 install (macOS, composer global require laravel/cloud-cli). Every database command fails before doing anything useful:

$ cloud database-cluster:list --json -n
Bad Request (400) Response: {
    "message": "Requested include(s) `schemas` are not allowed. Allowed include(s) are `databases`."
}

Same 400 from database-cluster:get <cluster> and database-snapshot:list <cluster> (the resolver hits the cluster endpoint with the same include).

We depend on database-cluster:list/get/update/delete, database-snapshot:list/create, and database-restore:create for a scripted snapshot → temp-cluster → dump → destroy workflow, and this blocks all of it. For what it's worth, #187 in v0.5.1 fixed the Form::$errors fatal in database-restore:create (#183), but that fatal fired before the HTTP call, so the obsolete /restores endpoint described here was hidden behind it. Would be great to see this merged and released.