Require the Varbase Canvas Base recipe in composer.json

Problem/Motivation

Horizon Aid is built on Drupal Canvas, but its composer.json does not require drupal/varbase_canvas_base, so sites built from the recipe do not get it (or its drupal/canvas_override dependency).

Steps to reproduce

1. Open composer.json on 1.0.x.
2. Look for drupal/varbase_canvas_base in require: it is not there.

Proposed resolution

• Add "drupal/varbase_canvas_base": "1.0.x-dev" to require in composer.json, next to the other Varbase base recipes.
• composer.json only: it is not added to recipes: in recipe.yml, so installs do not apply it.
• The release bump pins it to ~1.0.0 with the others.
• Checked: it resolves on a drupal/cms build (adds varbase_canvas_base and canvas_override 1.0.1).

Remaining tasks

• ✅ File an issue
• ✅ Addition/Change/Update/Fix
• ✅ Testing to ensure no regression
• ➖ Automated unit/functional testing coverage
• ➖ Developer Documentation support
• ➖ User Guide Documentation support
• ➖ UX/UI designer responsibilities
• ➖ Accessibility and Readability
• ❌ Reviewed by a human
• ❌ Code review by maintainers
• ❌ Full testing and approval
• ❌ Credit contributors
• ❌ Review with the product owner
• ✅ Update Release Notes
• ✅ Release

User interface changes

• N/A

API changes

• N/A

Data model changes

• N/A

Release notes snippet

• Require drupal/varbase_canvas_base.

AI-Generated: Yes