sm new project/module: generated event records implement IEvent directly and don't compile (should derive from DomainEvent) #218

Summary

A freshly scaffolded project does not compile: the generated domain-event record implements IEvent directly, but IEvent now requires EventId and OccurredAt.

Repro

dotnet tool install -g SimpleModule.Cli   # 0.0.37
sm new project InvoiceManager
cd InvoiceManager
dotnet build

Actual

Items.Contracts/Events/ItemCreatedEvent.cs(5,53): error CS0535:
  'ItemCreatedEvent' does not implement interface member 'IEvent.EventId'
Items.Contracts/Events/ItemCreatedEvent.cs(5,53): error CS0535:
  'ItemCreatedEvent' does not implement interface member 'IEvent.OccurredAt'
Build FAILED.

The generated file:

using SimpleModule.Core.Events;
namespace SimpleModule.Items.Contracts.Events;
public sealed record ItemCreatedEvent(int ItemId) : IEvent;

Root cause

feat(events): durable inbox/outbox via Wolverine EF Core (#192) added members to IEvent:

public interface IEvent
{
    Guid EventId { get; }
    DateTimeOffset OccurredAt { get; }
}

public abstract record DomainEvent : IEvent
{
    public Guid EventId { get; init; } = Guid.CreateVersion7();
    public DateTimeOffset OccurredAt { get; init; } = DateTimeOffset.UtcNow;
}

IEvent's own XML doc says "Event records typically inherit DomainEvent rather than implementing this directly." — but the sm new project / sm new module templates still emit : IEvent.

Suggested fix

Update the event template(s) in the CLI to derive from DomainEvent:

public sealed record ItemCreatedEvent(int ItemId) : DomainEvent;

Environment

• sm CLI 0.0.37, SimpleModule.* 0.0.37
• .NET SDK 10.0.202, Linux

Workaround

Change generated *Event records from : IEvent to : DomainEvent (or delete them if unused).