task: #3611408 Release Varbase Project Template 10.1.2

Related issue: Plan: Release Varbase Project Template 10.1.2

Version-bump MR for varbase_project 10.1.2:

• composer.json version: 10.1.x-dev -> 10.1.2.
• composer.json vardot/varbase requirement: 10.1.x-dev -> ~10.1.0 (released line).
• composer.json vardot/varbase-patches requirement: 10.1.x-dev -> ~10.1.0 (released line; no *-dev constraints remain in the root composer.json).
• composer.lock regenerated against the edited composer.json in an isolated, throwaway DDEV environment (drupal/core stays 11.4.4; vardot/varbase resolves to 10.1.1; vardot/varbase-patches resolves to 10.1.80). patches.lock.json unchanged (verified diff-empty both times). yarn.lock untouched (package.json not changed).
• README.md version badge bump.
• CHANGELOG.md entry for 10.1.2.

Do not merge until CI is green and reviewed.

AI-Generated: Yes (version bump, composer.lock regeneration, README/CHANGELOG updates drafted by the varbase-10-1-x-release agent; reviewed by Rajab Natshah.)

Checkpoints

• File an issue about this project
• Addition/Change/Update/Fix to this project
• Testing to ensure no regression
• Automated unit/functional testing coverage
• Developer Documentation support on feature change/addition
• User Guide Documentation support on feature change/addition
• 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