Changelog

Fix derive_form

* **Time/Date/Datetime fields not saved in `partial_update`:** a `return None` arm at the top of the match in `generate_partial_update` was silently discarding all temporal fields before reaching the correct chrono-parsing arms added in 2.0.2 — those arms were unreachable dead code. The blocking arm is removed; `NaiveTime`, `NaiveDate`, `NaiveDateTime`, and `DateTime` now persist correctly via `admin_partial_update`.