With reducing detail, I was talking about retention policies but was just missing the term 
Still I would prefer some data dumper from MQTT to InfluxDB instead to putting this into Node-RED. This is not, what Node-RED is made for. See e.g. the Victron Energy venus-influx-loader. But maybe we can create something similar for Batrium, when then WatchmonUDPListener becomes obsolete.
And I agree with the limited network capabilities of an ESP32 device, which will make it hard to send every value to a single MQTT topic.