Update the null deposit fields

[kderme]

When https://github.com/orgs/IntersectMBO/projects/8/views/5?pane=issue&itemId=55734154 is done, there are 2 new field stake_registration.deposit and pool_update.deposit. When doing an upgrade from an already populated db-sync, these fields will remain NULL. We want to query, that updates all the NULL values.

There are 2 ways to do it:

1. Querying the epoch_param
   A query will do a multi table join. In particulare, starting from a stake_registration (pool_update for pools) it will find its tx through stake_registration.tx_id. From the referenced tx it will find its block through tx.block_id. From the block it will find the epoch block.epoch_no. From this it will find the relevant params, epoch_param.epoch_no. From this the related key_deposit (pool_deposit for pools).

2. Using the genesis, since this value could not change until Conway. This option is only viable if this is released before Conway HF.