Flaky unit test for EventDomainAttributeUsageAnalyzerTests

[cptCloud]

Describe the bug
Flaky unit test for EventDomainAttributeUsageAnalyzerTests

To Reproduce
When we run all tests until failure in the Workleap.DomainEventPropagation solution, then the following unit test will randomly fail:
EventDomainAttributeUsageAnalyzerTests.Given_DomainEventAttribute_With_Non_Unique_Value_When_Analyze_Then_Diagnostic.

Expected behavior
All tests can be executed any amount of times without any failure.

[cptCloud]

Currently, in the EventPullerServiceTests, we are using a timeout based EventPullerService with a 50ms timeout. This is potentially causing flakiness and unreliability in our tests.

COS:

Rework our tests for the repository by removing the timeout and make it event based.