chore: Rename 'opt' to 'opts' in multiple methods

[alexandear]

This PR standardizes parameter naming from opt to opts in multiple service methods. Renaming function parameters does not break compatibility, so this change is safe.

opts is more commonly used throughout the repository:

❯ grep -r 'opt \*' --include='*.go' --exclude-dir=testdata . | wc -l
       7
❯ grep -r 'opts \*' --include='*.go' --exclude-dir=testdata . | wc -l
     321

[gmlewis]

Thank you, @alexandear!
LGTM.
Merging.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.48%. Comparing base (e1238d0) to head (784db54).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #3887   +/-   ##
=======================================
  Coverage   92.48%   92.48%           
=======================================
  Files         200      200           
  Lines       14564    14564           
=======================================
  Hits        13469    13469           
  Misses        895      895           
  Partials      200      200           

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