Hi @philippeb
I think this is something that you'd have to set up on the database and use triggers to get the database to notify FME Server every time there is a new feature. You can check how to do it by searching online for your '<databaseType> triggers to webhook'. You might need to use another tool to allow the database to send data to a webhook.
We have a few articles on database triggers but I don't think they have been updated in a while.
If you don't have access to the database like that, unfortunately a regular scheduled job may be your best approach.
Automatons has an HTTP call option - not sure if this can be of uses on a 1 min schedule.
otherwise you should check out node red:
https://nodered.org/
You can probably use this to process the response and send a request to FME Server. Only problem is you need to install node. But it's free...