e2e sentinel purge cleanup reports false error

[oskogstad]

Description

e2e purge test fails with

     █ Post run: checking for unpurged dialogs

       ✓ response status: expected 200 to equal 200
       ✓ has valid json body
       ✗ unpurged dialogs: expected 1 to equal +0

IDs that are successfully purged are not removed from the array that the test asserts against.

Reproduction

Run e2e test

Expected behavior

✅

Actual behavior

❌