Rebuild after formatting in prepare_release script

[Copilot]

After format.sh runs, the codebase may have changes that affect compilation. The script previously had no verification step post-formatting.

• Adds swift build -c release as step 9, immediately after format.sh
• Exits with an error if the build fails, preventing a broken release from proceeding silently

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.30%. Comparing base (08e0f66) to head (6d9dccd).
⚠️ Report is 2 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #2496   +/-   ##
========================================
  Coverage    95.30%   95.30%           
========================================
  Files          168      168           
  Lines        25383    25383           
========================================
+ Hits         24191    24192    +1     
+ Misses        1192     1191    -1     

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