Skip concept validation with [AspNetResult]

[Copilot]

Summary

Fixed

• Concept validators now skip execution when [AspNetResult] attribute is present on controller actions

When [AspNetResult] is applied to controller actions, the endpoint returns raw ASP.NET results instead of Arc's wrapped command/query results. Concept validators (ConceptValidator<T>) are Arc-specific and should not run in this mode. Regular validators (BaseValidator, CommandValidator, QueryValidator) continue to execute normally.

Implementation:

• Added ShouldSkipConceptValidation() to DiscoverableModelValidator that checks action filter descriptors for AspNetResultAttribute
• When detected, traverses validator inheritance chain to identify ConceptValidator<T> types and returns early without validation
• Non-concept validators are unaffected by the attribute

Original prompt

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This section details on the original issue you should resolve

<issue_title>When using [AspNetResult] we should also not include concept validation</issue_title>
<issue_description></issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes When using [AspNetResult] we should also not include concept validation #73

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