feat: Unfair fee distribution due to floating

However, this if is not good since it invalidates the purpose of the underflow. As a result, I am leaning no fix which is why I didn't fix tests

src/IncentivizedMessageEscrow.sol

@@ -810,9 +810,11 @@ abstract contract IncentivizedMessageEscrow is IIncentivizedMessageEscrow, Bytes
         // Compute the reward distribution. We need the time it took to deliver the ack back.
         uint64 executionTime;
         unchecked {
-            // Underflow is desired in this code chuck. It ensures that the code piece continues working
-            // past the time when uint64 stops working. *As long as any timedelta is less than uint64.
-            executionTime = uint64(block.timestamp) - messageExecutionTimestamp;
+            // If the timestamp between 2 different chains are not synced with eachother
+            // it may be that messageExecutionTimestamp > block.timestamp.
+            // If this happened, then the transaction was relayed pretty quickly
+            // So the source to destination relayer should get the funds.
+            executionTime = uint64(block.timestamp) > messageExecutionTimestamp ? uint64(block.timestamp) - messageExecutionTimestamp : 0;
         }
         // The incentive scheme is as follows: When executionTime = targetDelta then 
         // The rewards are distributed as per the incentive spec. If the time is less, then