Russia had to raise interest rates to 20% to achieve the recent appreciation. Russia is giving up economic growth for the foreseeable future to prop up its currency. I doubt many countries are eyeing a similar move
The overall impact seems to be fading to zero relatively quickly, excepting a much stronger ruble. Future growth numbers will be interesting to follow. Much could shift radically one way or the other depending on oil prices, but the US seems to have a declining level of influence with OPEC+.
It's 3.9% (which rounds up to 4%, not to 3%) this year and 5.6% next year.
This forecast is based on figures kindly provided by Russian authorities, which in times of war have strong incentives to be creative.
I don't think there's much reason to trust Russian Central Bank which has strong incentives (read: orders) to enhance the numbers.