Document proposed optics hutch blueAPI architecture

[DominicOram]

The two i19 EHs both use a shared optics hutch. There is a PV that says which hutch is currently controlling the optics. When one hutch is in control the other one should still be able to run plans to test equipment in their experiment hutch but they should not be able to move anything in the optics hutch.

Acceptance Criteria

• There is an architecture documented that will address this

[DominicOram]

Initial idea:

[CoePaul]

Yes this diagram matches the initial discussion.
I later asked ( Noemi ) if plans can call / delegate to / subcontrast to other auxiliary plans and I was given a clear answer in the affirmative.
I think going from the initial sketch to the fully fledged result will be easily possible using plans calling other plans as a way to protect symmetry considerations.