Automate domain creation

[Morendil]

Purpose

Completing #583, ensure users from communes can do something meaningful upon onboarding: create a default domaine for them, so that they can create mailboxes

Proposal

• Introduce ApiCall object, to avoid mocking and anticipating task queuing
• Call Scaleway API upon organization creation to provision subzone and email-related DNS entries

[Morendil]

@qbey Let me know when we could discuss this, even in draft status: this takes advantage of the plugin idea but aims it in a somewhat different direction, perhaps, than what your original PR implied.

I'm thinking that the plugins system could be a nice place to locate the responsibility for business rules such as attributing the admin role to a user automatically (what I have in mind for the communes use case, but that may not generalize to other kinds of orgs). For this to work we'd have to introduce additional "seams" corresponding to further points in the lifecycle, such as upon attributing the admin access.

[qbey]

@Morendil

The plugin system was designed for this, yes :) This first implementation does not respect the concern of genericity:

• NameFromSiretOrganizationPlugin must not be replaced, the CommuneCreation must be another plugin.
• We may add a field to the Organization like extra which would be a generic JSON field to store if the organization is a "commune", information we can get from NameFromSiretOrganizationPlugin with few modifications.
• Then the CommuneCreation would check if the Organization is a "commune", in which case it could trigger the domain creation (and maybe other stuffs).

I don't like the ApiCall object, it adds an overhead on something already simple. If you like, we can think about a small "Request" override to simplify the "retry", but I would prefer to keep this for later.