make signal not wait

[Relm-Arrowny]

Fixes #ISSUE

Instructions to reviewer on how to test:

1. Do thing x
2. Confirm thing y happens

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 99.04%. Comparing base (7ba8c48) to head (471a89c).

Additional details and impacted files

@@                        Coverage Diff                         @@
##           renovate/lock-file-maintenance    #1933      +/-   ##
==================================================================
- Coverage                           99.04%   99.04%   -0.01%     
==================================================================
  Files                                 306      306              
  Lines                               11593    11590       -3     
==================================================================
- Hits                                11482    11479       -3     
  Misses                                111      111              

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