Hi Hadjer,
From the Lifecycle Events in D2-Config perspective it would considered as a Feature. But you can also setup a composer object as Lifecycle to leverage the event as post procedure for dm_save_properties.
In D2-Config did you consider setting up the event for Email notification, Please test if this can achieve the same actions. This may be triggered on all the save actions of the document, rather than just a specific lifecycle action.
Thanks