Mx bluesky 135 stream to murko

[DominicOram]

Fixes DiamondLightSource/mx-bluesky#135

Instructions to reviewer on how to test:

1. Compare against docs in mx_bluesky and confirm behavior makes sense
2. Confirm unit tests pass

Checks for reviewer

• Would the PR title make sense to a scientist on a set of release notes
• If a new device has been added does it follow the standards
• If changing the API for a pre-existing device, ensure that any beamlines using this device have updated their Bluesky plans accordingly
• Have the connection tests for the relevant beamline(s) been run via dodal connect ${BEAMLINE}

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.41%. Comparing base (b88c415) to head (3c8c64e).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #733      +/-   ##
==========================================
+ Coverage   94.33%   94.41%   +0.07%     
==========================================
  Files         111      112       +1     
  Lines        4469     4526      +57     
==========================================
+ Hits         4216     4273      +57     
  Misses        253      253              

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[dperl-dls]

This seems fine for now. It could easily be a lot more generic if e.g. the stream url was configurable, and I wonder if the performance will always be good enough, but I think those are questions for later

[DominicOram]

the stream url was configurable,

Not sure what you mean here the URL is taken from the OAV. Do you mean make it generic to work with any given URL, even if it doesn't come from an OAV?

and I wonder if the performance will always be good enough, but I think those are questions for later

Yh, I've done no performance testing. Works for this use case though