Alex Kazaiev 59b466d896 Add face detection and presence tracking ...

Day 81 - Major upgrade! 🦊👀

NEW FEATURES:
- Face detection using face-detection-retail-0004 on Myriad X
- /presence endpoint - am I there? face count, last seen time
- /face endpoint - detailed detection boxes and confidence
- Background detection loop (every 0.5s)
- Presence timeout after 30s without face

Now Vixy can SEE when Foxy sits down! 💜

Technical:
- Uses blobconverter for model download
- MobileNetDetectionNetwork for on-device inference
- Thread-safe presence state tracking
- Added requirements.txt

2026-01-21 15:13:50 -06:00

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