UserServiceAbstractTest.apiKeys flaky test

[lampajr]

Describe the bug

Looks like DatabaseUserServiceTest>UserServiceAbstractTest.apiKeys is flaky and it is randomly failing:

Error:  Failures: 
Error:    DatabaseUserServiceTest>UserServiceAbstractTest.apiKeys:530->UserServiceAbstractTest.overrideTestSecurity:73->UserServiceAbstractTest.lambda$apiKeys$53:569 Expected a notification of key about to expire ==> expected: <false> but was: <true>
[INFO] 
Error:  Tests run: 264, Failures: 1, Errors: 0, Skipped: 2

To Reproduce

This is randomly happening in the CI, e.g., https://github.com/Hyperfoil/Horreum/actions/runs/12046551550/job/33587252350.
Could not find a reproducer yet.

[lampajr]

Other flaky tests that sometimes fail and sometimes not

Error:  Failures: 
Error:    AlertingServiceTest.testExpectRunTimeout:522 expected: <1> but was: <0>
Error:    AlertingServiceTest.testMissingRules:377 expected: <1> but was: <0>