fix(bootstrap): validate length of init data >= 4

src/core/Bootstrap.sol

@@ -482,7 +482,7 @@ contract Bootstrap is
     {
         require(_clientChainGatewayLogic != address(0), "Bootstrap: client chain gateway logic address cannot be empty");
         require(
-            _clientChainInitializationData.length > 0, "Bootstrap: client chain initialization data cannot be empty"
+            _clientChainInitializationData.length >= 4, "Bootstrap: client chain initialization data is malformed"
         );
         clientChainGatewayLogic = _clientChainGatewayLogic;
         clientChainInitializationData = _clientChainInitializationData;