SFace embeddings on top of YuNet's landmarks. Nothing is stored until someone is
enrolled with `python -m hermes_vision.people enroll NAME`; only 128-number
embeddings are kept, never images, in a 0600 JSON file under a 0700 directory,
written atomically. `list` and `forget` manage it. The detector node puts a
recognised name in Detection2D.id (empty if unknown) and picks up database
changes without a restart.
Checked with a throwaway database on the burst frames: eight of nine unenrolled
frames were recognised, down to side profiles (similarity 0.52-0.66), the miss
being a head tipped back at 0.34 against the 0.363 threshold, and an unrelated
photo scored 0.16 and stayed unknown.
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01AFN8nRRCiDiMN7ChBpHJhs
kyleandClaude Sonnet 5.5
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