Skip the loading of extra routers if an exception is encountered

[tieneupin]

Murfey has been configured to load additional routers from the entry point group "murfey.groups". However, these routers are only needed for a subset of the instruments we support, and for instruments that are missing the necessary machine configuration keys to run these extra routers, they crash and prevent the backend server from instantiating.

The most straightforward fix at present is to just log the failure of the extra router to initialise, and continue on with the start-up process. Eventually these add-on routers need to be configured such that receive the name of the instrument they are to support via a request from the client before proceeding with loading up the required configuration settings.

[codecov]

Codecov Report

❌ Patch coverage is 20.00000% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 49.29%. Comparing base (b9108c9) to head (5400537).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #767      +/-   ##
==========================================
- Coverage   49.31%   49.29%   -0.02%     
==========================================
  Files          92       92              
  Lines        9815     9818       +3     
  Branches     1296     1296              
==========================================
  Hits         4840     4840              
- Misses       4725     4728       +3     
  Partials      250      250              

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