Torjus Håkestad
c515a6b4e1
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WSDCGQ12LM sensors report battery: 0 due to firmware quirk. Override battery calculation using voltage via homeassistant value_template. Also adds zigbee_sensor_stale alert for detecting dead sensors regardless of battery reporting accuracy (1 hour threshold). Device configuration moved from external devices.yaml to inline NixOS config for declarative management. Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>