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* Security fixes for ``«model».save()`` & ``«model».delete()``:
This is now fully parametrized, and these operations are no longer susceptible to escaping issues.
* Performance improvements:
- Simple update is now ~3-6× faster
- Partial update is now ~3× faster
- Delete is now ~2.7x faster
- Fix generated Schema Primary Key for ``BigIntField`` for MySQL and PostgreSQL.
- Added support for using a ``SmallIntField`` as a auto-gen Primary Key.
- Ensure that default PK is added to the top of the attrs.