New reuse: ping the producer

[abulte]

We could send an email to the producer of a dataset when a new reuse is created. This would let the producer know immediately about potentially interesting usages of his data.

This is something that can be useful for https://transport.data.gouv.fr but probably for others too.

Two challenges at least:

• How do we handle spam? A lot of spammers create reuses on unrelated datasets. This would spam the producers. Maybe delay sending the notification?
• How do we handle big organisations? At the moment, we have to notify the entire Organization when something happens. This can be issue on large orgs (Ministries). We should look at some data to see what kind of emails we would have sent the past few months.

[noirbizarre]

Already exists: https://github.com/opendatateam/udata/blob/master/udata/core/reuse/tasks.py#L31-L42 Never activated because of the noise

[abulte]

@noirbizarre good to know! Thanks.