[vz-dev] [volkszaehler/vzlogger] 8338cc: allow mqtt_topic to be set from the channel config

[Thorben T.]

  Branch: refs/heads/master
  Home:   https://github.com/volkszaehler/vzlogger
  Commit: 8338cc9eb2031e115efb60664869e0125552ae79
      https://github.com/volkszaehler/vzlogger/commit/8338cc9eb2031e115efb60664869e0125552ae79
  Author: Marc Haber <mh+git-unconfigured-202508 at zugschlus.de>
  Date:   2026-06-23 (Tue, 23 Jun 2026)

  Changed paths:
    M include/Channel.hpp
    M src/Channel.cpp
    M src/mqtt.cpp

  Log Message:
  -----------
  allow mqtt_topic to be set from the channel config

This backwards-compatible change allows one to set the mqtt topic from
the channel configurtation. Currently, the meter values are published
via an mqtt topic that is set to the channel number, which changes
whenever a new channel is defined or and old deleted. And it's totally
not mnemonic.

This addresses issue #420 from 2020.



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