Log Attrs getting dropped when new loggers are created

[wesbillman]

If new loggers with scope and/or attrs are created, the new values are not being recorded as part of the log entry.

// Time returns the current time.
//
//ftl:verb export
func Time(ctx context.Context, req TimeRequest) (TimeResponse, error) {
	logAttrs := map[string]string{"keya": "a", "keyb": "b"}
	logger := ftl.LoggerFromContext(ctx).Scope("new_scope").Attrs(logAttrs)
	logger.Infof("Time request received")
	return TimeResponse{Time: time.Now()}, nil
}

The expected attributes would be:

{
  "deployment": "<whatever key>",
  "keya": "a",
  "keyb": "b",
  "module": "time",
  "scope": "new_scope"
}

But we're getting:

{
  "deployment": "<whatever key>",
  "module": "time",
  "scope": "time"
}