chore(services): fetch etablissement adresse from API Entreprise

app/lib/api_entreprise/service_adapter.rb

@@ -0,0 +1,23 @@
+class APIEntreprise::ServiceAdapter < APIEntreprise::EtablissementAdapter
+  def initialize(siret, service_id)
+    @siret = siret
+    @service_id = service_id
+  end
+
+  private
+
+  def get_resource
+    api_instance = api
+    # TODO: reuse instead a token from an administrateur's procedure?
+    api_instance.token = Rails.application.secrets.api_entreprise[:key]
+    api_instance.api_object = "service_id: #{@service_id}"
+    api_instance.etablissement(@siret)
+  end
+
+  def attr_to_fetch
+    [
+      :adresse,
+      :siret
+    ]
+  end
+end