As long as there is no clause requiring you to tell them about your legal status in Canada, you do not have to tell them anything. My last job was a contract job and it required me to be eligible and legally authorized to work in Canada. Even with this clause, I was not required to report anything to them as long as I am authorized to work in Canada. Since you are on implied status, you are authorized to work in Canada until you get a decision. Don't tell them anything that they don't need to know. If they explicitly ask you, show them the information on IRCC and your AOR.
I'll re-read the entire contract to make sure. But for now, it seems that the general consensus is "(they)don't ask, (you)don't tell" or "(you)tell when asked".
I'll re-read the entire contract to make sure. But for now, it seems that the general consensus is "(they)don't ask, (you)don't tell" or "(you)tell when asked".