feat: enable feature versioning for environments in newly created projects

[matthewelwell]

Changes

Enable feature versioning for environments in newly created projects (based on a flag).

How did you test this code?

TODO

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3 Skipped Deployments

Name	Status	Preview	Comments	Updated (UTC)
docs	⬜️ Ignored (Inspect)	Visit Preview		Jul 8, 2025 11:32am
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flagsmith-frontend-staging	⬜️ Ignored (Inspect)	Visit Preview		Jul 8, 2025 11:32am

[github-actions[bot]]

Uffizzi Ephemeral Environment deployment-60945

:cloud: https://app.uffizzi.com/github.com/Flagsmith/flagsmith/pull/5108

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[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 97.77%. Comparing base (a6a5b06) to head (5ae9249). Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #5108   +/-   ##
=======================================
  Coverage   97.77%   97.77%           
=======================================
  Files        1255     1255           
  Lines       44317    44349   +32     
=======================================
+ Hits        43331    43363   +32     
  Misses        986      986           

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[matthewelwell]

Ok, I think this PR is ready for review now @khvn26 .

I've made a few simplifications and I think it's a lot clearer now what the purpose of the PR is. I've removed some of the code which was resolving unrelated bad test code to another PR, and created a separate issue in the flagsmith-python-client repository to handle improving our testing capabilities.

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Docker builds report

Image	Build Status	Security report
ghcr.io/flagsmith/flagsmith-e2e:pr-5108	Finished :white_check_mark:	Skipped
ghcr.io/flagsmith/flagsmith-api-test:pr-5108	Finished :white_check_mark:	Skipped
ghcr.io/flagsmith/flagsmith-frontend:pr-5108	Finished :white_check_mark:	Results :white_check_mark:
ghcr.io/flagsmith/flagsmith-api:pr-5108	Finished :white_check_mark:	Results :white_check_mark:
ghcr.io/flagsmith/flagsmith:pr-5108	Finished :white_check_mark:	Results :white_check_mark:
ghcr.io/flagsmith/flagsmith-private-cloud:pr-5108	Finished :white_check_mark:	Results :white_check_mark: