chore: Fix Pydantic misbehaving with Freezegun

[khvn26]

Thanks for submitting a PR! Please check the boxes below:

• I have run pre-commit to check linting
• I have added information to docs/ if required so people know about the feature!
• I have filled in the "Changes" section below?
• I have filled in the "How did you test this code" section below?
• I have used a Conventional Commit title for this Pull Request

Changes

Please describe.

How did you test this code?

Please describe.

[vercel]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

Name	Status	Preview	Comments	Updated (UTC)
docs	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	May 1, 2024 8:26pm
flagsmith-frontend-preview	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	May 1, 2024 8:26pm
flagsmith-frontend-staging	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	May 1, 2024 8:26pm

[github-actions]

Uffizzi Ephemeral Environment deployment-51128

☁️ https://app.uffizzi.com/github.com/Flagsmith/flagsmith/pull/3871

📄 View Application Logs etc.

What is Uffizzi? Learn more!

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.87%. Comparing base (41981d4) to head (d441b39).
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3871   +/-   ##
=======================================
  Coverage   95.86%   95.87%           
=======================================
  Files        1131     1131           
  Lines       35834    35841    +7     
=======================================
+ Hits        34354    34361    +7     
  Misses       1480     1480           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[zachaysan]

I appreciate the effort, but this does not solve the error.

[zachaysan]

We ended up merging the workaround here:

#3876

Feel free to try to improve it if you want.