[Bug] Discrepancy between Web API + FluentValidation and Blazor + Blazored.FluentValidation when validating deeply nested child properties

Hi.

Thank you for Blazored.FluentValidation! 🙏

Description I'm seeing a discrepancy when validating a model with deeply nested child properties in Blazored.FluentValidation when compared to using FluentValidation in a Web API controller.

Blazored.FluentValidation doesn't seem to automatically pick up the validation rules for the deeply nested child properties.

To Reproduce Steps to reproduce the behavior:

Clone the repo at https://github.com/icnocop/BlazoredFluentValidation.
Set BlazorServer as the Startup Project.
Run the project.
Click on the Validate button.

Notice the validation error messages:

• 'Age' must be greater than '0'.
• 'Name' must not be empty.

Now, make a POST request to /api/Pets with the following JSON body:
```
{
"Address": { }
}
```

Notice the response with validation error message:

{
"type": "https://tools.ietf.org/html/rfc7231#section-6.5.1",
"title": "One or more validation errors occurred.",
"status": 400,
"traceId": "|86f990a0-4b7f30a1df18614a.",
"errors": {
    "Age": [
        "'Age' must be greater than '0'."
    ],
    "Name": [
        "'Name' must not be empty."
    ],
    "Address.Street": [
        "'Street' must not be empty."
    ]
}
}

Expected behavior I expected Blazored.FluentValidation to display the validation error message • 'Street' must not be empty..

Screenshots HTTP POST using Postman for example:

Hosting Model I've only tested with Blazor Server.

Additional context In Startup.cs, I'm automatically registering validators and implicitly validating child properties:

public void ConfigureServices(IServiceCollection services)
{
    ...

    services.AddFluentValidation(fv =>
    {
        fv.RegisterValidatorsFromAssemblyContaining<Startup>();
        fv.ImplicitlyValidateChildProperties = true;
    });

    ...
}

Similar to https://github.com/Blazored/FluentValidation/issues/82#issuecomment-914898397, to work-around this issue, I have to explicitly set the validator on the child property by un-commenting the code on line 20 in .\samples\BlazorServer\Models\Pet.cs.

Thank you! 🙏

Blazored / FluentValidation

[Bug] Discrepancy between Web API + FluentValidation and Blazor + Blazored.FluentValidation when validating deeply nested child properties #84