Make data backup only
To migrate to use firebird in rust it is needed to have utf8 compatible character set.
As we have very old datbase definition with character set NONE definied it is now impossible to make a simple backup and restore inside a new fresh database
It is somehow impossible to make an dataonly backup and restore inside a other empty database with only schema defined
Using al kind of other tools are or slower or complicate data transfers with foreign keys etc / disabling triggers etc etc
You are basically asking for what a data-pump does. There are many such tools out there. Take a look at IBPhoenix FBOpt, it can (beside other things) do exactly what you want with -DATA_ONLY switch.