I have a friend who puts on a longbow shooting demonstration at the local SCA Renaissance Fair, he has several hickory long bows he lets the interested shoot. I looked at one and saw chrysals from stem to stern, perhaps a dozen of them, every hickory bow he had was the same.
He said they had been that way for years, none had ever failed.
Perhaps you will get lucky, I would give the area a good sinew wrap for insurance although I have never seen a bow crack all the way around like yours.