fix: Custom Gunicorn logger not sending StatsD stats

[khvn26]

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Changes

This enables StatsD support for our own GunicornJsonCapableLogger.

How did you test this code?

Will test manually with @rolodato's StatsD debug setup.

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3 Skipped Deployments

Name	Status	Preview	Comments	Updated (UTC)
docs	⬜️ Ignored (Inspect)	Visit Preview		Nov 13, 2024 4:41pm
flagsmith-frontend-preview	⬜️ Ignored (Inspect)	Visit Preview		Nov 13, 2024 4:41pm
flagsmith-frontend-staging	⬜️ Ignored (Inspect)	Visit Preview		Nov 13, 2024 4:41pm

[github-actions]

Docker builds report

Image	Build Status	Security report
ghcr.io/flagsmith/flagsmith-api-test:pr-4819	Finished ✅	Skipped
ghcr.io/flagsmith/flagsmith-e2e:pr-4819	Finished ✅	Skipped
ghcr.io/flagsmith/flagsmith-frontend:pr-4819	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith-api:pr-4819	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith:pr-4819	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith-private-cloud:pr-4819	Finished ✅	Results ✅

[github-actions]

Uffizzi Preview deployment-58057 was deleted.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.35%. Comparing base (e6f1bac) to head (d63f10e).
Report is 15 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4819      +/-   ##
==========================================
+ Coverage   97.33%   97.35%   +0.02%     
==========================================
  Files        1180     1182       +2     
  Lines       41223    41272      +49     
==========================================
+ Hits        40123    40179      +56     
+ Misses       1100     1093       -7     

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[gagantrivedi]

Missing coverage