Align README runtime requirements and local core-test filtering with required CI semantics.\n\nCo-authored-by: factory-droid[bot] <138933559+factory-droid[bot]@users.noreply.github.com>
Align local Makefile core tests with the required CI selection through a shared manifest and regression coverage.
Required validate passed at exact head f12e7fd576. Advisory droid-review failed with no actionable findings and is not a required gate.