algons: expose error for dnsaddr command

[onetechnical]

Summary

For troubleshooting it's helpful to print the error in this algons subcommand.

Test Plan

Built and ran and found an error in invocation. :)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 56.17%. Comparing base (81edd96) to head (be8113e).
Report is 4 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #6121      +/-   ##
==========================================
- Coverage   56.20%   56.17%   -0.04%     
==========================================
  Files         492      492              
  Lines       69829    69829              
==========================================
- Hits        39248    39226      -22     
- Misses      27915    27937      +22     
  Partials     2666     2666              

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