Use MFA in Archethic's cache for hooks

To avoid this, we should expose MFA instead of a private function in the cache to be called, avoiding the need to kill the process just to make a hot reload.

_Originally posted by @samuelmanzanera in https://github.com/archethic-foundation/archethic-node/pull/1101#discussion_r1231870659_

Locate the cache hook implementation and the private function referenced in the issue, then read how hooks invoke it. Confirm the intended MFA exposure supports hot reload without killing the process, and identify the relevant tests or verification path for that behavior.

Written by the indexing model from the issue text.