* 538 add support for casting types in postgres
* Add typing to postgres insert nodes and removed unnecessary field from crate db
* Added placeholder and description for types in postgres
* Adding tests to insert and changes suggested by Ben
* ⚡ Minor improvement
Co-authored-by: mutdmour <mutdmour@gmail.com>
Co-authored-by: Jan Oberhauser <jan.oberhauser@gmail.com>
