chore: adopt sympress qa tooling

[brianvarskonst]

Summary

Adopts the shared sympress/qa package and routes Composer QA scripts through the shared commands.

Checklist

• The change is focused and scoped to one concern.
• Tests or verification notes are included for behavior changes.
• Documentation was added or updated where needed.
• Public APIs, configuration keys, and contracts are described clearly.
• Backward compatibility impact is noted.

Type of Change

• Bug fix
• Feature
• Documentation
• Refactoring
• Maintenance
• Breaking change

Verification

• git diff --check origin/main...HEAD
• Not run locally: PHP/composer are not available in this shell; package CI should run the PHP QA commands.

Notes

No runtime API impact expected; this is development tooling only.

[brianvarskonst]

Reviewed the package-level diff and CI result. The PR is limited to shared QA tooling adoption, uses a conventional commit, and GitHub Actions is green. No blocking findings.