> Apparently you can have your fridge safely keeping your food for up to 4h, but you should not open it during that period obviously

Kinda depends on fridge, altho sadly it's rare to see that number in manuals.

But one trick is to just take food that you want to eat anyway from the freezer and put it in fridge, the food will slowy defrost while cooling the fridge food. Just make sure water have somewhere to go