Add version flag to worker command

[jraddaoui]

Refs artefactual-sdps/preprocessing-base#2.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 4 lines in your changes are missing coverage. Please review.

Project coverage is 24.67%. Comparing base (94e7871) to head (e966ea2).
Report is 1 commits behind head on main.

❗ Current head e966ea2 differs from pull request most recent head 0ea2e92

Please upload reports for the commit 0ea2e92 to get more accurate results.

Files	Patch %	Lines
cmd/worker/main.go	0.00%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main       #9      +/-   ##
==========================================
- Coverage   24.83%   24.67%   -0.17%     
==========================================
  Files          16       16              
  Lines         604      608       +4     
==========================================
  Hits          150      150              
- Misses        434      438       +4     
  Partials       20       20              

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