Preserve oracle semantics in generated regression judgments

Assistant: codex
Assistant-Model: gpt-6-astra
Assistant-Session: 01a0e76f-be98-7ae3-965d-e0b31290a4c4

tests/test_crystallization.py

@@ -190,6 +190,7 @@ def test_the_generated_module_imports_no_agentic_machinery():
     ]
     assert imports == [
         "from __future__ import annotations",
+        "import unittest",
         "from scenarios.alice_bob_carol import _bob_can_read, "
         "_bob_cannot_write, _carol_cannot_read",
     ], imports