fix: vesting start time

Author: PavelNaydanov

src/tokenDistribution/vesting/Vesting.sol

@@ -124,7 +124,7 @@ contract Vesting is IVesting, Initializable {
      * @param schedule The structure that defines the vesting schedule
      */
     function _initializeSchedule(Schedule calldata schedule) private {
-        if (schedule.startTime < block.timestamp) {
+        if (schedule.startTime == 0) {
             revert InvalidStartTime();
         }
 

test/tokenDistribution/vesting/Vesting.t.sol

@@ -120,20 +120,17 @@ contract VestingTest is Test {
         vesting.initialize(META, schedule, beneficiaries);
     }
 
-    function test_deploy_revertIfInvalidStartTime(uint64 blockTimestamp, uint64 invalidBlockTimestamp) external {
+    function test_deploy_revertIfInvalidStartTime() external {
         (Beneficiary[] memory beneficiaries, Schedule memory schedule) = _getBeneficiariesAndSchedule();
 
-        blockTimestamp = uint64(bound(blockTimestamp, 1, type(uint64).max));
-        invalidBlockTimestamp = uint64(bound(invalidBlockTimestamp, 0, blockTimestamp - 1));
-        schedule.startTime = invalidBlockTimestamp;
+        schedule.startTime = 0;
 
         Vesting vestingImpl = new Vesting();
         address vestingAddress = Clones.clone(address(vestingImpl));
 
         vm.prank(distributor);
         META.transfer(vestingAddress, VESTING_TOTAL_AMOUNT);
 
-        vm.warp(blockTimestamp);
         vm.expectRevert(IVesting.InvalidStartTime.selector);
 
         Vesting(vestingAddress).initialize(META, schedule, beneficiaries);