Saves video clips around each detection event (30 days retention,
active objects only). Allows reviewing the car at rest for LPR.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Sub-stream at 640x360 produced low quality snapshots and poor LPR accuracy.
Switched detect to main stream 1920x1080 at 2fps (VAAPI handles decoding).
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>