fix: Environments don't preserve feature versioning when cloned

[matthewelwell]

Changes

This PR resolves an issue found in manual testing (because one of my unit tests had a bug in it 🤦 ) where cloning an environment did not enable v2 versioning, even when the flag was enabled.

How did you test this code?

Updated the buggy unit test...

[vercel]

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3 Skipped Deployments

Name	Status	Preview	Comments	Updated (UTC)
docs	⬜️ Ignored (Inspect)	Visit Preview		Jul 9, 2025 4:13pm
flagsmith-frontend-preview	⬜️ Ignored (Inspect)	Visit Preview		Jul 9, 2025 4:13pm
flagsmith-frontend-staging	⬜️ Ignored (Inspect)	Visit Preview		Jul 9, 2025 4:13pm

[github-actions]

Docker builds report

Image	Build Status	Security report
ghcr.io/flagsmith/flagsmith-e2e:pr-5740	Finished ✅	Skipped
ghcr.io/flagsmith/flagsmith-api-test:pr-5740	Finished ✅	Skipped
ghcr.io/flagsmith/flagsmith-frontend:pr-5740	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith-api:pr-5740	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith:pr-5740	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith-private-cloud:pr-5740	Finished ✅	Results ✅

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.77%. Comparing base (d688c09) to head (708c23e).
Report is 6 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #5740   +/-   ##
=======================================
  Coverage   97.77%   97.77%           
=======================================
  Files        1255     1255           
  Lines       44351    44357    +6     
=======================================
+ Hits        43365    43371    +6     
  Misses        986      986           

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