[MateoLostanlen]

Part of pyronear/roadmap#16, fixes the camera API side of #422.

• Every Reolink request now has a 10 s default timeout. A PTZ call without timeout could block a patrol thread forever.
• Each stored image keeps its capture time. latest_image returns 204 when the image is older than max_age_s (default 300 s), so the engine stops scoring frozen frames and stops sending heartbeats for that camera.
• /health/patrols returns 503 when a running patrol makes no progress for 10 min. The compose healthcheck then kills every process but PID 1 (tini, via init: true) so restart: always brings the container back. /health stays a plain liveness check, as the Shelly watchdog uses it to decide whether to power-cycle the Pi.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 80.51%. Comparing base (a2604d4) to head (3a25856).

Additional details and impacted files

@@           Coverage Diff            @@
##           develop     #458   +/-   ##
========================================
  Coverage    80.51%   80.51%           
========================================
  Files            6        6           
  Lines          847      847           
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  Hits           682      682           
  Misses         165      165           

Flag	Coverage Δ
unittests	80.51% <ø> (ø)

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