Implement IKeyedServiceProvider

[commonsensesoftware]

Implement IKeyedServiceProvider

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Description

The versioned IEndpointRouteBuilder should support keyed services. This issue has existed since IKeyedServiceProvider was introduced but has remained hidden. I did an audit on all IServiceProvider decorators and this appears to be the only uncovered scenario.

• Fixes VersionedEndpointRouteBuilder.ServiceProviderDecorator doesn't implement IKeyedServiceProvider #1219