check_publish: make end user message more friendly
The original message was lacking usefull information to users not aware of Heptapod specific topics rules.
Closes: heptapod#315 (closed)
This instance will be upgraded to Heptapod 18.5.1 on 2025-11-13 between 17:00 and 18:00 UTC+2
The original message was lacking usefull information to users not aware of Heptapod specific topics rules.
Closes: heptapod#315 (closed)