chore: Set phone_number through Website SDK (#2803)

Fixes: #2599

spec/actions/contact_identify_action_spec.rb

@@ -45,6 +45,17 @@ describe ::ContactIdentifyAction do
       end
     end
 
+    context 'when contact with same phone_number exists' do
+      it 'merges the current contact to phone_number contact' do
+        existing_phone_number_contact = create(:contact, account: account, phone_number: '+919999888877')
+        params = { phone_number: '+919999888877' }
+        result = described_class.new(contact: contact, params: params).perform
+        expect(result.id).to eq existing_phone_number_contact.id
+        expect(result.name).to eq existing_phone_number_contact.name
+        expect { contact.reload }.to raise_error(ActiveRecord::RecordNotFound)
+      end
+    end
+
     context 'when contacts with blank identifiers exist and identify action is called with blank identifier' do
       it 'updates the attributes of contact passed in to identify action' do
         create(:contact, account: account, identifier: '')