feat: prefetch image related fields in event API

[sentry]

Fixes LINKEDEVENTS-4. The issue was that: EventSerializer's nested field access triggers N+1 queries due to incomplete prefetch_related in EventViewSet's queryset.

• Add prefetching for image-related fields in the event API.
• Prefetches created_by, data_source, last_modified_by, license, and publisher for images when 'images' are included in the request.
• Improves performance by reducing database queries for image-related data.

This fix was generated by Seer in Sentry, triggered automatically. 👁️ Run ID: 594568

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[azure-pipelines]

LINKEDEVENTS-API branch is deployed to platta: https://linkedevents-pr1154.api.dev.hel.ninja 🚀🚀🚀

[azure-pipelines]

LINKEDEVENTS-API branch is deployed to platta: https://linkedevents-pr1154.api.dev.hel.ninja 🚀🚀🚀

[mhieta]

@sentry review

[Copilot]

Pull request overview

This PR addresses an N+1 query problem in the EventSerializer by adding prefetch optimization for image-related fields when the include=images parameter is used in the event API.

Changes:

• Added prefetch_related for image foreign key relationships (created_by, data_source, last_modified_by, license, publisher) in the EventViewSet
• Added comprehensive test coverage to verify the prefetch optimization prevents N+1 queries when listing multiple events with images

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
events/api.py	Adds prefetch_related optimization for image-related fields in the _optimize_include method
events/tests/test_event_get.py	Adds test to verify that query count remains constant when adding more events with images

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[azure-pipelines]

LINKEDEVENTS-API branch is deployed to platta: https://linkedevents-pr1154.api.dev.hel.ninja 🚀🚀🚀

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud