Fix exception handling in IsIdentifiable service

[rkm]

Proposed Changes

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Types of changes

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• Bugfix (non-breaking change which fixes an issue)
• New Feature (non-breaking change which adds functionality)
• Breaking Change (fix or feature that would cause existing functionality to not work as expected)
• Documentation-Only Update (if none of the other choices apply)
  • In this case, ensure that the message of the head commit from the source branch is prefixed with [skip ci]

Checklist

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• Reviewed the contributing guidelines for this repository
• Ensured that the PR branch is in sync with the target branch (i.e. it is automatically merge-able)
• Updated any relevant API documentation
• Created or updated any tests if relevant
• Created a news file
  • NOTE: This must include any changes to any of the following files: default.yaml, any of the RabbitMQ server configurations, GlobalOptions.cs
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Issues

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• Closes #<issue-number>
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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 59.80%. Comparing base (25c8919) to head (a70ba34).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1806      +/-   ##
==========================================
+ Coverage   59.79%   59.80%   +0.01%     
==========================================
  Files         177      177              
  Lines        6332     6334       +2     
  Branches      870      871       +1     
==========================================
+ Hits         3786     3788       +2     
  Misses       2305     2305              
  Partials      241      241              

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