Save intermediate submissions

Save intermediate submissions to db and use for retained state through refreshes

code-rails/packages/server/routes/tasks-router.ts

Lines 231 to 234 in 8ef78bf

    
           userTask.submissions.push({ 
        
               code: data.code, 
        
               submittedAt: finishedAt, 
        
           });

Fixed by #22

	userTask.submissions.push({
	code: data.code,
	submittedAt: finishedAt,
	});