chore: prepare release v2.1.1

[bot-go-openapi]

This PR prepares the mono-repo for release v2.1.1.

Changes:

• Updated inter-module dependencies to v2.1.1
• Ran go mod tidy on all modules
• Synced go.work (if present)

This PR will be auto-merged once all checks pass.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 88.29%. Comparing base (77f5ec8) to head (da7b8e2).
⚠️ Report is 1 commits behind head on master.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##           master      #16   +/-   ##
=======================================
  Coverage   88.29%   88.29%           
=======================================
  Files          59       59           
  Lines        7389     7389           
=======================================
  Hits         6524     6524           
  Misses        725      725           
  Partials      140      140           

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