[Claude] Add Go 1.25 to CI test matrix

[mpyw]

Summary

• Add Go 1.25 to the CI test matrix
• Update lint and release workflows to use Go 1.25

Details

Go 1.25 was released on August 12, 2025. This PR adds Go 1.25 to the test matrix to ensure compatibility with the latest Go version.

Test plan

• CI passes with Go 1.25

🤖 This PR was automatically created by Claude

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (13a0bcf) to head (dfd2ea3).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main        #4   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            3         3           
  Lines          108       108           
=========================================
  Hits           108       108           

Flag	Coverage Δ
unittests	100.00% <ø> (ø)

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

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.