CleanCarbon

In the contract `CarboTokenv2` the role `ADMIN` has authority over the functions shown in the diagram below. Any compromise to the `ADMIN` account may allow the hacker to take advantage of this authority and change the address of the `ADMIN` role or send the tokens allocated for airdrop to any address that they wish.  --- In the contract `StakingCarbon` the role `ADMIN` has authority over the functions shown in the diagram below. Any compromise to the `ADMIN` account may allow the hacker to take advantage of this authority and change the address with the `ADMIN` role or add any staking option they wish.  --- In the contract `AirdropCarbonv2` the role `ADMIN` has authority over the functions shown in the diagram below. Any compromise to the `ADMIN` account may allow the hacker to take advantage of this authority and change the address of the `ADMIN` role.  --- In the contract `CarboTokenv2`, `StakingCarbon`, and `AirdropCarbonv2` the role `DEFAULT_ADMIN_ROLE` has authority over the functions shown in the diagram below. Any compromise to the `DEFAULT_ADMIN_ROLE` account may allow the hacker to take advantage of this authority and withdraw any ERC20 token held by the contract.  In addition, the DEFAULT_ADMIN_ROLE can also grant or revoke the ADMIN role.