Currently, a workflow transition is recorded as a "notice" which is very in-your-face during migrations. Given that this message is just informational, I'd suggest logging it with "info" level.
* Import a workflow-enabled content using migrations.
* Observe: The screen is flooded with [notice] messages.
Log such messages using "info" level, i.e. logger(...)->info(...);
Postponed: needs info
1.0
Code