PostgreSQL type deduction is borked in some situations

See https://code.jeremyevans.net/2022-11-01-forcing-sequential-scans-on-postgresql.html Add a note to **Tips & Tricks** warning about this and suggest `next.jdbc.types/as-other` as a possible workaround. Credit to [Peter Bex](https://github.com/sjamaan) for alerting me to this.