The nice package is the flood of articles in the Mockingbird press that it was a power struggle in the Kremlin or an angry Russian. That fit’s the CIA and Brit intel war aims.
It really could have been about that fast. The woman was not worried about covering her tracks because she had a solid exfiltration plan. She only needed to remain hidden long enough to conduct the op and have 10 hours afterwards. Finding her identity would be fast.
You are jaded by FBI investigations that take months and years. They take that long because while things are “under investigation”, facts can remain secret with gag orders.
Think about mass shootings etc in America. Investigators know the bad guy’s identity nearly immediately. Within the hour people are at his residence and know much more.
But it remains concealed an inordinate amount of time for them to scrub social media, prep their propaganda message, etc.
The flood of articles is about speculation, there are a number of possibilities.
Russia instantly issued its claim and you instantly took it to heart.