v0.2.8 — hotfix: startup crash on fresh installs

Fixes #1: fresh installs and updates since v0.2.x crashed on start with ImportError: cannot import name 'find_face_padded' — a helper function in engine.py was missing from the published sources (it existed only on my development instance, which is why it slipped through testing).

If your app is stuck: update to v0.2.8 (Settings → Apps → FaceID → Update; if no update is offered yet, reload the app store or remove and re-add the repository). Your face data in the app's data volume is unaffected.

The release process now runs an automated import-consistency check so this class of error can't ship again. Thanks @KoenvanH for the quick report!