fix the re-tag bug

[ncode]

This pull request updates the tag comparison logic in the TagIt service to ensure only prefixed tags are considered for updates, while preserving non-prefixed tags. It also adds a new test case to verify that no update occurs when prefixed tags remain unchanged.

Tag comparison logic improvements:

• Modified needsTag in pkg/tagit/tagit.go to extract prefixed and non-prefixed tags, compare only prefixed tags with the update, and combine non-prefixed tags with the updated tags for the result. This prevents unnecessary updates and ensures original non-prefixed tags are retained.

Test coverage enhancements:

• Added a test case to TestNeedsTag in pkg/tagit/tagit_test.go to verify that no update occurs when prefixed tags are unchanged, improving reliability of the tag update logic.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.18%. Comparing base (09d3fe8) to head (488c3f7).

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #22      +/-   ##
==========================================
+ Coverage   88.99%   89.18%   +0.19%     
==========================================
  Files           8        8              
  Lines         436      444       +8     
==========================================
+ Hits          388      396       +8     
  Misses         36       36              
  Partials       12       12              

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