fix(postgres-analytics/usage): fix project_id filter

[gagantrivedi]

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Changes

fixes https://flagsmith.sentry.io/issues/5255763789/?project=5544478&query=is%3Aunresolved+issue.priority%3A%5Bhigh%2C+medium%5D&referrer=issue-stream&statsPeriod=14d&stream_index=0
closes #4170

How did you test this code?

Covered by unit test

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3 Ignored Deployments

Name	Status	Preview	Comments	Updated (UTC)
docs	⬜️ Ignored (Inspect)			Jun 17, 2024 10:55am
flagsmith-frontend-preview	⬜️ Ignored (Inspect)			Jun 17, 2024 10:55am
flagsmith-frontend-staging	⬜️ Ignored (Inspect)			Jun 17, 2024 10:55am

[github-actions]

Uffizzi Preview deployment-53101 was deleted.

[khvn26]

LGTM

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.50%. Comparing base (245ad60) to head (524dfbc).
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4171   +/-   ##
=======================================
  Coverage   96.50%   96.50%           
=======================================
  Files        1177     1177           
  Lines       38198    38217   +19     
=======================================
+ Hits        36863    36883   +20     
+ Misses       1335     1334    -1     

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