Handle ownership transfers with two steps and two transactions. First, allow the current owner to propose a new owner address. Second, allow the proposed owner (and only the proposed owner) to accept ownership, and update the contract owner internally.
Implement zero address check and consider implementing a two step process where the owner nominates an account and the nominated account needs to call an acceptOwnership() function for the transfer of ownership to fully succeed. This ensures the nominated EOA account is a valid and active account.
