Harden live mail OAuth and immutable releases

tests/unit/test_mailbox_credentials.py

@@ -89,6 +89,19 @@ def test_rotation_reencrypts_existing_credentials_with_primary_key(user):
         assert decrypt_mailbox_password(connection) == "rotate-me"
 
 
+@pytest.mark.django_db
+def test_rotation_skips_outlook_oauth_connections(user):
+    MailboxConnection.objects.create(
+        user=user,
+        platform=MailboxConnection.Platform.INDEED,
+        provider=MailboxConnection.Provider.OUTLOOK,
+        username="vacatureradar@example.invalid",
+        encrypted_password="",
+    )
+
+    assert rotate_mailbox_credentials() == 0
+
+
 @pytest.mark.django_db
 def test_private_imap_host_is_blocked_before_connection(user):
     key = Fernet.generate_key().decode("ascii")