Allow configuration of plan imports to perform automatic wrapping with selected pre-processors

[DiamondJoseph]

e.g. wrapping all built-in bluesky plans with @attach_metadata, to ensure that DirectoryProvider is updated and queried without requiring proxied versions of those plans (once those plans have type annotations).

[callumforrester]

Another thought, can also use the scanID hook on the run engine

[stan-dot]

@DiamondJoseph what is the difference between proxied and non-proxied versions of plans?

Also the issue name is quite nebulous

[DiamondJoseph]

@stan-dot I meant

import bluesky.plan_stubs as bps

@diamond_specific_decorator(s)
def func(*args, **kwargs) -> MsgGenerator:  # Diamond specific annotations
    return bps.func(*args, **kwargs)

So we have a proxy version of func that meets our requirements but is just calling into the non-proxied version.

The ticket supposes that we have a module that we want to import all plan funcs from (e.g. bluesky.plan_stubs) but we want all of our Diamond specific handling to be done, e.g. annotations, decorators.

[stan-dot]

do we have many of those DLS specific decorators?

[DiamondJoseph]

We have one that is absolutely required for data writing
https://github.com/DiamondLightSource/dodal/blob/e8f8b62363e83028d10ac071b557f2d7848c6327/src/dodal/plans/data_session_metadata.py#L12

And will probably have another for ensuring devices are connected?

[DiamondJoseph]

When all instruments are migrated to NumTracker, this will become not required for the wrapped plans in dodal.

[abbiemery]

This is no longer required for data writing. Adding pre-processors via config can be revisited when it becomes an issue.