Add database `afterCreate` pool `init` hook

This will allow specific database connection params to be used, like WAL mode on Sqlite, or CockroachDB options like serial_normalization etc.

Discussed in


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^{Originally posted by xmichaelx June 28, 2022}
Is Directus using WAL with SQLite backend? If not is it possible to enable it with executing pragma journal_mode=wal; somewhere? Can it be configured?

I see that in
there is line which enables foreign_keys await run('PRAGMA foreign_keys = ON'); would it be possible to add WAL? or at least do so depending on additional variable?</div>