Eva Lott

Closes #1926 ## Description New messages `"read_all"` and `"trigger_all"` to read or trigger a sequence of `Readable` or `Triggerable`, allowing for the asynchronous implementations to be ran together. This allows...

Allow multiple ophyd async devices passed into `one_shot` to be read together asynchronously

1

We are beginning the process of converting devices to ophyd-async. ophyd-async `read`/`describe`'s asynchronously across all a device's subdevices: https://github.com/bluesky/ophyd-async/blob/61186ffd4c7268cd6a47fbe3588be85afdb1e8be/src/ophyd_async/core/_readable.py#L116-L128 ``` python async def describe_configuration(self) -> dict[str, DataKey]: return await merge_gathered_dicts(...

Flakey test on windows

3

On the [test run](https://github.com/bluesky/bluesky/actions/runs/13308159093/job/37163837737), the following test failed on windows with python 3.9: ``` =========================== short test summary info =========================== FAILED src/bluesky/tests/test_utils.py::test_CallbackRegistry_1[class_method-True-True] - AssertionError: Incorrect number of signals assert 2...