taking pks from filter

[jason-ford-codecov]

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Note

Medium Risk
Alters cleanup deletion query construction for ReportSession, which could impact which rows are deleted if the ID materialization/chunking behavior differs from the prior FK-based filters. Main risk is around large-delete performance/correctness on reports_upload.

Overview
Improves cleanup deletion performance for ReportSession (reports_upload) by rewriting relation-graph querysets from FK-based __in filters to PK-based pk__in filters when the parent IDs have been materialized, aiming to force index scans instead of sequential scans.

Adds a regression test to assert build_relation_graph produces ReportSession delete querysets that filter on the primary key.

^{Written by Cursor Bugbot for commit 0423209. This will update automatically on new commits. Configure here.}

[sentry]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.26%. Comparing base (dcdfd9c) to head (0423209).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #769   +/-   ##
=======================================
  Coverage   92.26%   92.26%           
=======================================
  Files        1304     1304           
  Lines       47924    47927    +3     
  Branches     1628     1628           
=======================================
+ Hits        44219    44222    +3     
  Misses       3396     3396           
  Partials      309      309           

Flag	Coverage Δ
workerintegration	58.56% <33.33%> (-0.01%)	⬇️
workerunit	90.39% <100.00%> (+<0.01%)	⬆️

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[codecov-notifications]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ All tests successful. No failed tests found.

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