Upgrade zod

[lakardion]

Zod is a peer dependency which has fallen behind for a whole minor.
Users installing a more recent version than the one we have declared in the library seems to cause some weird behaviours with the types, we should check out what it looks like when upgrading the version internally|

tn-models-fp/package.json

Line 48 in cb86ce8

"zod": ">=3.21.4"

Zod has a >= which is a bit of misleading since users are installing more recent versions than what they should (given these type errors we've been experiencing) So we can also take the oportunity with this issue as well to have a look at how we declare the peer dependency to avoid such issues.