Missing fields from `StakePoolParams`

We're missing a bunch of fields compared to the [implementation](https://github.com/IntersectMBO/cardano-ledger/blob/master/libs/cardano-ledger-core/src/Cardano/Ledger/State/StakePool.hs#L424). Since conformance tests didn't find any, this means these are either disabled or never generated?

I believe we are missing `id, vrf, relays` and `metadata`. I think `accountAddress` is our `rewardAccount` (matching with the fact that their `AccountAddress` type is just a newtype wrapped `Credential`.

When adding these, it would be good to check what kind of validation the implementation performs on these. Note that except for the `vrf`, all of these are also missing from the original Shelley spec.

Compare StakePoolParams with the linked Cardano ledger implementation, then inspect the conformance tests and the original Shelley spec. Determine how id, vrf, relays, metadata, and accountAddress/rewardAccount map and what validation the implementation applies; done means the missing fields and their validation are represented consistently.

Written by the indexing model from the issue text.