Include command info when command fails validation

[tsurdilo]

Currently when handling schedule activity task command from workflow task completion
we check payload size limit, but do not log the command info (activity type would be great) as part of the error info, for example:

       return nil, nil, handler.terminateWorkflow(enumspb.WORKFLOW_TASK_FAILED_CAUSE_BAD_SCHEDULE_ACTIVITY_ATTRIBUTES, err)

here err does not include any info about the offending activity, would be great to have this info if possible as would make debugging easier