ImportError when startup script imports bluesky

[ddkohler]

When I try to build a list of devices and scans with a script, and that script imports from bluesky, e.g.

/startup.py

from bluesky.preprocessors import baseline_decorator

Running qserver-list-plans-devices --startup-script startup.py fails, trying to import numpy again within a multiprocessing process:

Traceback (most recent call last):
  File "/usr/local/lib/python3.14/site-packages/bluesky_queueserver/manager/gen_lists.py", line 218, in run
    existing_plans, existing_devices, _, _ = existing_plans_and_devices_from_nspace(
                                             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^
        nspace=nspace, ignore_invalid_plans=ignore_invalid_plans, max_depth=device_max_depth
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    )
    ^
  File "/usr/local/lib/python3.14/site-packages/bluesky_queueserver/manager/profile_ops.py", line 3416, in existing_plans_and_devices_from_nspace
    devices_in_nspace = devices_from_nspace(nspace)
  File "/usr/local/lib/python3.14/site-packages/bluesky_queueserver/manager/profile_ops.py", line 765, in devices_from_nspace
    if is_device(obj):
       ~~~~~~~~~^^^^^
  File "/usr/local/lib/python3.14/site-packages/bluesky_queueserver/manager/profile_ops.py", line 680, in is_device
    from bluesky.protocols import Flyable, Readable
  File "/usr/local/lib/python3.14/site-packages/bluesky/__init__.py", line 3, in <module>
    from .preprocessors import SupplementalData
  File "/usr/local/lib/python3.14/site-packages/bluesky/preprocessors.py", line 6, in <module>
    from bluesky.protocols import Locatable
  File "/usr/local/lib/python3.14/site-packages/bluesky/protocols.py", line 5, in <module>
    from event_model.documents import Datum, StreamDatum, StreamResource
  File "/usr/local/lib/python3.14/site-packages/event_model/__init__.py", line 33, in <module>
    import numpy
  File "/usr/local/lib/python3.14/site-packages/numpy/__init__.py", line 112, in <module>
    from numpy.__config__ import show_config
  File "/usr/local/lib/python3.14/site-packages/numpy/__config__.py", line 4, in <module>
    from numpy._core._multiarray_umath import (
    ...<3 lines>...
    )
  File "/usr/local/lib/python3.14/site-packages/numpy/_core/__init__.py", line 24, in <module>
    from . import multiarray
  File "/usr/local/lib/python3.14/site-packages/numpy/_core/multiarray.py", line 11, in <module>
    from . import _multiarray_umath, overrides

ImportError: cannot load module more than once per process

I've got a simple reproduction of the issue as a docker container. Full docker workflow log shown here.

I am using bluesky==1.15.0, bluesky-queueserver==0.0.24, numpy==2.4.4.

For numpy <2.4 the double import would raise a warning rather than an error, but the issue persists.
In our lab, we have pinned numpy <2.4 for now.