Phase 2 increment 3: FacePgRepository implements FaceRepository.
Embeddings stored/read as BYTEA (512 little-endian f32), bbox as REAL[].
Every query is user-scoped. Covers face CRUD, person CRUD (create / rename
/ cover / hide), files-for-person, and a transactional delete-all-for-user
(right to erasure).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01JW6ghFMDtnRYuYNzZhb47M
Claude