The test calls ai_client.send() but does not check the return value -
it only verifies the side effect on gemini cache stats. Migrating to
send_result() and asserting result.ok is enough.
Changes:
- Rename ai_client.send(...) to ai_client.send_result(...)
- Add assert result.ok (the return value is unused)
- Add "from src.result_types import Result" import
2 tests pass.
ed