Content Enricher Generator

[GenerateContentEnricher] creates an AsyncContentEnricher<TPayload> factory from attributed async enrichment methods.

[GenerateContentEnricher(typeof(CustomerProfileUpdate), EnricherName = "customer-profile-enrichment")]
public static partial class GeneratedCustomerProfileContentEnricher
{
    [ContentEnrichmentStep("normalize-email", Order = 10)]
    private static ValueTask<CustomerProfileUpdate> NormalizeEmail(
        CustomerProfileUpdate profile,
        MessageContext context,
        CancellationToken cancellationToken)
        => ValueTask.FromResult(profile with { Email = profile.Email?.Trim().ToLowerInvariant() });
}

Step methods must be static, return ValueTask<TPayload>, and accept TPayload, MessageContext, and CancellationToken. ContentEnrichmentErrorPolicy.UseDefault requires DefaultFactoryName to point at a static method that accepts and returns the payload type.

The generated factory is suitable for DI registration:

services.AddSingleton(_ => GeneratedCustomerProfileContentEnricher.Create());