Wire Tap Generator

[GenerateWireTap] creates a typed WireTap<TPayload> factory from ordered static tap handlers.

[GenerateWireTap(typeof(OrderEvent), FactoryName = "Create", TapName = "order-observability")]
public static partial class GeneratedOrderWireTap
{
    [WireTapHandler("audit", 10)]
    private static void Audit(Message<OrderEvent> message, MessageContext context) { }
}

Handlers must be static void methods with (Message<TPayload>, MessageContext) parameters. Duplicate handler names or orders are reported at compile time.