Publish phone numbers as objects

The standard introduced this a while ago but I didn't notice.

We have to update integrations like Disco Regen now.

engines/dfc_provider/app/services/enterprise_builder.rb

@@ -19,7 +19,7 @@ class EnterpriseBuilder < DfcBuilder
       catalogItems: catalog_items,
       emails: [enterprise.email_address].compact,
       localizations: [address],
-      phoneNumbers: [enterprise.phone].compact,
+      phoneNumbers: phone_numbers(enterprise),
       socialMedias: SocialMediaBuilder.social_medias(enterprise),
       logo: enterprise.logo_url(:small),
       mainContact: contact(enterprise),
@@ -71,4 +71,15 @@ class EnterpriseBuilder < DfcBuilder
       lastName:, # rubocop:disable Naming/VariableName
     )
   end
+
+  def self.phone_numbers(enterprise)
+    return [] if enterprise.phone.blank?
+
+    number = DataFoodConsortium::Connector::PhoneNumber.new(
+      nil,
+      phoneNumber: enterprise.phone,
+    )
+
+    [number]
+  end
 end

swagger/dfc.yaml

@@ -435,7 +435,9 @@ paths:
                     - "@id": http://test.host/api/dfc/enterprises/10000
                       "@type": dfc-b:Enterprise
                       dfc-b:hasAddress: http://test.host/api/dfc/addresses/40000
-                      dfc-b:hasPhoneNumber: 0404 444 000 200
+                      dfc-b:hasPhoneNumber:
+                        "@type": dfc-b:PhoneNumber
+                        dfc-b:phoneNumber: 0404 444 000 200
                       dfc-b:email: hello@example.org
                       dfc-b:websitePage: https://openfoodnetwork.org
                       dfc-b:hasSocialMedia: http://test.host/api/dfc/enterprises/10000/social_medias/facebook
@@ -520,7 +522,9 @@ paths:
                     - "@id": http://test.host/api/dfc/enterprises/10000
                       "@type": dfc-b:Enterprise
                       dfc-b:hasAddress: http://test.host/api/dfc/addresses/40000
-                      dfc-b:hasPhoneNumber: 0404 444 000 200
+                      dfc-b:hasPhoneNumber:
+                        "@type": dfc-b:PhoneNumber
+                        dfc-b:phoneNumber: 0404 444 000 200
                       dfc-b:email: hello@example.org
                       dfc-b:websitePage: https://openfoodnetwork.org
                       dfc-b:hasSocialMedia: http://test.host/api/dfc/enterprises/10000/social_medias/facebook