Handle blueapi connection error

[jacob720]

Improves handling of blueapi connection error and adds endpoint to check config

[codecov]

Codecov Report

❌ Patch coverage is 77.77778% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 99.64%. Comparing base (cb87d78) to head (1fe951f).
⚠️ Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
src/daq_queuing_service/api/api.py	80.00%	1 Missing ⚠️
src/daq_queuing_service/api/errors.py	75.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##              main      #29      +/-   ##
===========================================
- Coverage   100.00%   99.64%   -0.36%     
===========================================
  Files           12       12              
  Lines          557      561       +4     
===========================================
+ Hits           557      559       +2     
- Misses           0        2       +2     

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