Use SA0 to derive key for local storage

[itisprasad]

Formosa password prompted from user upon selecting profile. Derive symmetric key from it used for:

base of TLPs;
intermediary states of both memory-hard hash and TLP;
memorization-assistant decks on their stages 2 and above (informative decks). Caveat: ;

Created based on https://codeberg.org/yurisvb/T3-Staff-Records/issues/220

[c0d3sw0t]

@Yuri-SVB would like to get more information about this one.
clarifications for
Formosa password prompted from user upon selecting profile. Derive symmetric key from it used for: