librarian: generation failed for `google-cloud-dialogflow`

[ohmayr]

Generation for google-cloud-dialogflow failed as per #15521

[parthea]

______ ERROR at setup of test_create_generator_evaluation_async_from_dict ______
--
  |  
  | self = <Coroutine test_create_generator_evaluation_async_from_dict>
  |  
  | >   ???
  |  
  | .nox/unit-3-14-protobuf_implementation-python/lib/python3.14/site-packages/pytest_asyncio/plugin.py:458:
  | _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
  | .nox/unit-3-14-protobuf_implementation-python/lib/python3.14/site-packages/pytest_asyncio/plugin.py:728: in pytest_fixture_setup
  | ???
  | .nox/unit-3-14-protobuf_implementation-python/lib/python3.14/site-packages/pytest_asyncio/plugin.py:806: in _scoped_runner
  | ???
  | /usr/local/lib/python3.14/asyncio/runners.py:59: in __enter__
  | ???
  | /usr/local/lib/python3.14/asyncio/runners.py:146: in _lazy_init
  | ???
  | /usr/local/lib/python3.14/asyncio/events.py:844: in new_event_loop
  | ???
  | /usr/local/lib/python3.14/asyncio/events.py:732: in new_event_loop
  | ???
  | /usr/local/lib/python3.14/asyncio/unix_events.py:61: in __init__
  | ???
  | /usr/local/lib/python3.14/asyncio/selector_events.py:63: in __init__
  | ???
  | _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
  |  
  | self = <selectors.EpollSelector object at 0x7f1f1cfbe930>
  |  
  | >   ???
  | E   OSError: [Errno 24] Too many open files

[parthea]

This failure only occurs in librarian automation. The tests pass when running in Github Actions. Assigning back to @ohmayr who is looking into this