fix: re-send HA MQTT autodiscovery on every reconnect#3
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Discovery configs are published as retained messages and were sent only once, on the first connect after boot (guarded by lastMqttHassAutodiscoverySent==0). When the broker restarts without persistence, all retained messages are lost and the device never re-announces, so Home Assistant entities disappear until the device is rebooted. mqttReconnect() only runs on an actual (re)connect, so re-announcing unconditionally is idempotent and self-heals a broker restart. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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Discovery configs are published as retained messages and were sent only once, on the first connect after boot (guarded by lastMqttHassAutodiscoverySent==0). When the broker restarts without persistence, all retained messages are lost and the device never re-announces, so Home Assistant entities disappear until the device is rebooted. mqttReconnect() only runs on an actual (re)connect, so re-announcing unconditionally is idempotent and self-heals a broker restart.