chore: Release v0.43.1

[MeltyBot]

Prepare MeltanoSDK v0.43.1 for release.

Checklist:

• Check that the right version is set in all the files.
• Groom the changelog for wording or missing entries.
• Merge this PR once everything looks good.

Release Draft

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📚 Documentation preview 📚: https://meltano-sdk--2808.org.readthedocs.build/en/2808/

[codspeed-hq]

CodSpeed Performance Report

Merging #2808 will not alter performance

_{Comparing release/v0.43.1 (9c7bef3) with main (2ae5a1e)}

Summary

✅ 7 untouched benchmarks

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.29%. Comparing base (2ae5a1e) to head (9c7bef3).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2808   +/-   ##
=======================================
  Coverage   91.29%   91.29%           
=======================================
  Files          62       62           
  Lines        5190     5190           
  Branches      669      669           
=======================================
  Hits         4738     4738           
  Misses        319      319           
  Partials      133      133           

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