Alexander Kislitsyn

> The IdentityFeature also appears tosupply defaults for some of these services, how can this be changed? In your project after all registrations you can replace any of service descriptor....

I believe `CreateSchedulesHostedService` cause this behaviour. `DefaultWorkflowDefinitionStorePopulator` call `GetWorkflowsAsync` of CLR Provider. Later `IndexTriggersAsync` method is used to **store triggers** and send notifications. `ScheduleWorkflows` class handles notification and calls `ScheduleAsync`...

@MaxBrooks114 I can create a PR after @sfmskywalker confirm that this solution will not breake something else. Are there other features that should be revised beside ISystemClock?

I looked at systemclock feature and it's already registered as singleton in `SystemClockFeature.cs`. Also `IServiceProvider` in `LocalScheduler` is used for creating of `ScheduledCronTask`, `ScheduledRecurringTask`, `ScheduledSpecificInstantTask` and this classes have `IServiceScopeFactory`...

It will resolve #5391 issue