HC2 infrastructure MQTT publisher. Timer every minute. Publishes HC2 controller metrics to MQTT. Python venv ha_tools. Hardening: base4.

Script: /home/gandalf/prod/cortex/src/cortex/hc2_infra_mqtt.py (SOT at ~/working/cortex/src/cortex/hc2_infra_mqtt.py, deployed via cortex vivo rule). Reads HC2 creds from javelin.fibaro.User/PW in secrets.json. NOTE: start.sh SCRIPT_EXEC was historically at /home/gandalf/prod/tools/ha/hc2_infra_mqtt.py (relocated 2026-04-14).