Make webhooks payload truly iso with v1 and more robust

1. intitule/description is not required and can't be undefined for some
   authorization requests
2. `contacts` was renamed `team_members`
3. `demarche` is an id, not a name
4. `team_members` has the applicant as "demandeur"

app/serializers/webhook_authorization_request_serializer.rb

@@ -9,7 +9,6 @@ class WebhookAuthorizationRequestSerializer < ApplicationSerializer
     :previous_authorization_request_id,
     :copied_from_authorization_request_id
 
-  has_many(:contacts, serializer: ContactSerializer)
   has_many(:events, serializer: WebhookEventSerializer) do
     object.events.map(&:decorate)
   end
@@ -18,9 +17,29 @@ class WebhookAuthorizationRequestSerializer < ApplicationSerializer
     object.scopes.to_h { |scope| [scope.to_sym, true] }
   end
 
-  def demarche = object.form.name
-  def status   = object.state
-  def siret    = object.organization.siret
+  def intitule    = object.data['intitule']
+  def description = object.data['description']
+  def demarche    = object.form.id
+  def status      = object.state
+  def siret       = object.organization.siret
+
+  def team_members
+    object.contacts.map do |contact|
+      ContactSerializer.new(contact).serializable_hash
+    end << applicant_as_team_member
+  end
+
+  def applicant_as_team_member
+    {
+      id: nil,
+      type: 'demandeur',
+      email: object.applicant.email,
+      given_name: object.applicant.given_name,
+      family_name: object.applicant.family_name,
+      phone_number: object.applicant.phone_number,
+      job: object.applicant.job_title,
+    }
+  end
 
   def previous_authorization_request_id = nil
   def copied_from_authorization_request_id = nil

app/serializers/webhook_serializer.rb

@@ -27,7 +27,7 @@ def to_json(*_args)
   private
 
   def model_type
-    authorization_request.class.name.underscore
+    "enrollment/#{authorization_request.class.name.underscore.split('/').last}"
   end
 
   def now