[MateoLostanlen]

Part of pyronear/roadmap#16, engine side of #422.

• Night patrols were only stopped when already stopped (inverted condition), so they ran all night. They are now stopped when running.
• Day or night was decided from the last frame of the loop, so one stale or infrared frame could put the whole site to sleep in daylight. Each frame is now checked: night frames are not analyzed, and the site sleeps only when every frame of the pass is a night frame. A night frame also drops the camera's detection history, so evening frames are not combined with the next morning's.
• A frame identical to the previous one for the same pose is skipped. A frozen camera at Epinay re-uploaded the same false positive every 30 s for 9 days.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 83.81%. Comparing base (a2604d4) to head (b1c525d).

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #459      +/-   ##
===========================================
+ Coverage    80.51%   83.81%   +3.29%     
===========================================
  Files            6        6              
  Lines          847      865      +18     
===========================================
+ Hits           682      725      +43     
+ Misses         165      140      -25     

Flag	Coverage Δ
unittests	83.81% <100.00%> (+3.29%)	⬆️

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