Implement recurring time capsule

[Tzal3x]

Right now if there is no server to check if last check in has expired, the secret will never be published.
A sui-native solution is needed to remove this vulnerability.

Consider using a hexcapsule that resets every time a checkpoint is received to the contract.

If there is no built-in option, resetting the hexcapsule would mean to destroy the old one and create a new one with a new expiration date.