You are lucky to have a good MP, who contacted IRCC for you.
Also, you got all answers. Be patience.
@Tomican I am happy you got some information regarding your application although it is not the kind of news you were hoping for, but its better than nothing. Now regarding your questions.
1. The TR to PR programme - International Student stream due to technical error was oversubscribed by 17,000. So the IRCC has a backlog with the TR to PR pathway which has lead to delays along with COVID-19 restrictions.
2. The file number is there for your reference purposes ...nothing else you can do with it
3. There's no set timeframe for AORs because the selection process is random. However, seeing that you have a temporary file number you're likely to get the AOR soon. How soon, is soon? hard to say!
4. Applications are being processed based on the established Immigration policies and guidelines.
Hope this is useful