fix: re-added removed variables to preserve storage layout, marked as deprecated for later removal

Author: jaybuidl

contracts/src/arbitration/SortitionModuleBase.sol

@@ -50,9 +50,11 @@ abstract contract SortitionModuleBase is ISortitionModule, Initializable, UUPSPr
     uint256 public minStakingTime; // The time after which the phase can be switched to Drawing if there are open disputes.
     uint256 public maxDrawingTime; // The time after which the phase can be switched back to Staking.
     uint256 public lastPhaseChange; // The last time the phase was changed.
+    uint256 public randomNumberRequestBlock; // DEPRECATED: to be removed in the next redeploy
     uint256 public disputesWithoutJurors; // The number of disputes that have not finished drawing jurors.
     IRNG public rng; // The random number generator.
     uint256 public randomNumber; // Random number returned by RNG.
+    uint256 public rngLookahead; // DEPRECATED: to be removed in the next redeploy
     uint256 public delayedStakeWriteIndex; // The index of the last `delayedStake` item that was written to the array. 0 index is skipped.
     uint256 public delayedStakeReadIndex; // The index of the next `delayedStake` item that should be processed. Starts at 1 because 0 index is skipped.
     mapping(bytes32 treeHash => SortitionSumTree) sortitionSumTrees; // The mapping trees by keys.