chore: protect test_customObjects.py from regeneration (ids field fix)

Author: mourraille

.fernignore

@@ -2,3 +2,8 @@
 banner.png
 README.md
 changelog.md
+
+# BatchDeleteObjectRecordsRequestIdentifiersIds.ids is a required field (per OpenAPI spec)
+# but the generated test instantiates the class with no arguments, causing a Pydantic
+# ValidationError. Fixed to pass ids=[1, 2, 3]. Protected until Fern fixes the generator.
+tests/wire/test_customObjects.py