Smart HTTP Mapping

Domain Error-Aware Status Code Detection (v1.20.0)

The ToIResult() family reads the HttpStatusCode tag from domain errors for accurate HTTP mapping:

Domain Error	HTTP Status	IResult
NotFoundError	404	Results.NotFound(message)
ValidationError	422	Results.Problem(detail, statusCode: 422)
ConflictError	409	Results.Conflict(message)
UnauthorizedError	401	Results.Unauthorized()
ForbiddenError	403	Results.Forbid()
No tag / generic Error	400	Results.Problem(detail, statusCode: 400)

// Domain errors automatically map to correct HTTP status codes
var result = Result<User>.Fail(new NotFoundError("User", 42));
return result.ToIResult(); // → 404 Not Found (reads HttpStatusCode tag)