test: add comprehensive BTT tests for TOB-KERNEL-1 fix

Author: leekt

src/policies/TimelockPolicy.sol

@@ -225,8 +225,8 @@ contract TimelockPolicy is PolicyBase, IStatelessValidator, IStatelessValidatorW
 
         emit ProposalCreated(account, id, userOpKey, validAfter, validUntil);
 
-        // Return success with validUntil=0 to persist storage but prevent execution
-        // EntryPoint will reject because block.timestamp > 0 (validUntil)
+        // Return success (validationData = 0) to allow the proposal creation to persist
+        // EntryPoint treats validationData == 0 as valid (no time range check)
         return _packValidationData(0, 0);
     }
 

test/TimelockPolicy.t.sol

@@ -284,7 +284,7 @@ contract TimelockPolicyTest is PolicyTestBase, StatelessValidatorTestBase, State
         uint256 result = policyModule.checkUserOpPolicy(policyId(), userOp);
         vm.stopPrank();
 
-        // Returns success with validUntil=0 (expired) - state persists but execution fails
+        // Returns success (validationData = 0) - valid indefinitely per ERC-4337
         // This allows proposal creation via UserOp without external caller
         assertEq(result, 0);