...Still doesn’t give me a clear answer on my questions.
It is neither. It is up to multiple months for eggs with intact blooms at room temperatures. I'm not sure about washed, refrigerated eggs.
There is not a clear answer for several reasons. One is the temperature (as given above). Also humidity. Possibly another reason is is how heavy the bloom of a given chicken or maybe other such variations among chickens.
Another is how much rubbing the egg got between being layed and reaching the storage place. Sometimes I gather an egg with the bloom still damp; maybe some sticks to my fingers? Other times I gather a dry egg with two fingers and don't shift my hold until it reaches the egg carton. Other times, I stick it in my pocket then get mail, shovel the driveway, then go in and set it on the table on a dish towel, move it out of the way five times before putting it in the egg carton.
Then there is how much risk different people are willing to take. Or ewww tolerance they have. Usually it is less risk if the person is telling someone else how much to take. Especially if it is a person responsible for official recommendations.
Then there is the definition of "last." Egg contents can change quite a lot without becoming at all dangerous. Some changes probably result in less nutrition. Some might not. Last week, my husband told me to use just that day's eggs for his sunny side ups. He likes the high whites (and neither of us could think of a reason not to). For him, the eggs "last" one day. And I used 3 month old eggs in pancakes last week with no bad effects. I'm testing ways of keeping eggs that will last from molt to starting laying again in the spring
I've looked a little several times for studies done on the nutritional changes of eggs over time with and without the bloom but haven't found much.