fix: Numbers such as 1e100 cannot be retrieved from DynamoDB

[khvn26]

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Changes

Fixes #4915.

How did you test this code?

I'm planning to test in staging by inserting faulty data in the staging identities table.

[vercel]

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3 Skipped Deployments

Name	Status	Preview	Comments	Updated (UTC)
docs	⬜️ Ignored (Inspect)			Dec 11, 2024 6:10pm
flagsmith-frontend-preview	⬜️ Ignored (Inspect)			Dec 11, 2024 6:10pm
flagsmith-frontend-staging	⬜️ Ignored (Inspect)			Dec 11, 2024 6:10pm

[github-actions]

Docker builds report

Image	Build Status	Security report
ghcr.io/flagsmith/flagsmith-e2e:pr-4916	Finished ✅	Skipped
ghcr.io/flagsmith/flagsmith-api-test:pr-4916	Finished ✅	Skipped
ghcr.io/flagsmith/flagsmith-frontend:pr-4916	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith-api:pr-4916	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith:pr-4916	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith-private-cloud:pr-4916	Finished ✅	Results ✅

[github-actions]

Uffizzi Preview deployment-59035 was deleted.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.39%. Comparing base (5405cc5) to head (5da54bd).
Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4916   +/-   ##
=======================================
  Coverage   97.39%   97.39%           
=======================================
  Files        1190     1190           
  Lines       41527    41530    +3     
=======================================
+ Hits        40445    40448    +3     
  Misses       1082     1082           

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