chore: #3634601 Release 9.0.0-alpha1

AI Yasrequested to merge
issue/cloud-3634601:3634601-release-9-0-0-alpha1 into 9.x

Summary

  • Replace tracked 9.x-dev version references with 9.0.0-alpha1, including library metadata and Cloud Orchestrator deployment templates.
  • Verify that CloudFormation version choices remain unique.

Known limitations

  • Cloud Dashboard supports Drupal 11.4 and later in the Drupal 11 series only. It is excluded from Drupal 12 until Simple OAuth and Consumers provide Drupal 12-compatible releases.

  • The existing Cloud Cluster Cloud Orchestrator template generates invalid YAML when a nonempty GitHub OAuth token is supplied. Deployments using this Cloud Cluster template with a GitHub OAuth token are unsupported in this alpha; the token-enabled path needs a separate fix.

  • For stable-minimum-stability Composer projects, explicitly permit the prerelease theme dependencies when installing Cloud:

    composer require 'drupal/cloud:^9@alpha' 'drupal/rigel:^9@alpha' 'drupal/bootstrap5:^5@beta'

Validation

  • Pipeline 1025964 passed at commit 6c2c401f7ea55f4d7d2bb6d6327cff1e1f74738c: Composer, coding standards, PHPStan, and all three PHPUnit shards for Drupal 11.4.11 and Drupal 12 development.
  • Parsed all 15 changed static YAML files, checked CloudFormation AllowedValues for duplicates, ran PHP syntax and git diff --check, and confirmed no tracked 9.x-dev references remain.
  • Validated the Cloud Cluster Twig manifest separately after rendering with an empty optional GitHub OAuth token.

Related to #3634601.

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