Sqlcipher compatibility

[DeHby]

I have compatibility problems when using sqlcipher with sqlite_orm

When dealing with the sqlite3_key problem, I used the on_open method to solve it.

But if I use pragma, it will get an error.

The reason for the failure is that the callback of on_open precedes set_pragma.

I hope to add "before" and "after" callbacks for compatibility or other better ways.