fix(queue): remove unused score import and related assignment in Nack method

[juniorrhis1]

closes #79

This pull request makes a small change to the internal/queue/queue.go file, specifically related to how message scores are handled when a message is negatively acknowledged (Nack). The main change is the removal of code that directly sets the message score to a minimum value during this process.

• Removed the dependency on the score package in internal/queue/queue.go.
• Removed the line that sets msg.Score to score.Min in the Nack method, so the score is no longer forcibly reset when a message is Nacked.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 80.87%. Comparing base (4b13b0a) to head (d7690e5).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #80      +/-   ##
==========================================
- Coverage   80.88%   80.87%   -0.01%     
==========================================
  Files          27       27              
  Lines        3071     3070       -1     
==========================================
- Hits         2484     2483       -1     
  Misses        418      418              
  Partials      169      169              

Flag	Coverage Δ
coverage	80.87% <ø> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Components	Coverage Δ
Service	80.24% <ø> (ø)
Queue	82.70% <ø> (-0.01%)	⬇️
Audit	83.33% <ø> (ø)
Config	93.05% <ø> (ø)
Command	50.80% <ø> (ø)
Metrics	88.98% <ø> (ø)
Cache	81.39% <ø> (ø)
Storage	79.21% <ø> (ø)
Helpers	61.59% <ø> (ø)

Files with missing lines	Coverage Δ
internal/queue/queue.go	92.65% <ø> (-0.03%)	⬇️

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