There are no procedures established to move the CG forward to "guard against stall" - in fact, no airplane which would require such an intervention should be flying as a commercial transport.
@PJ2 thank for your detailed explanation!
shurely no commercial airplane should fly into a CB....
I did not mean a "guard against stall" just the few percent less risk, if one lift the aerodynamic stability on a truly higher level in case of expected turbulences, using existing technics......
I wonder, but it shows again the trust into the control system