[FEATURE] added bitmask status and activity log for status

__Tasks:__

- [x] implemented activity log to track status changes of an order
- [x] added bitmask for status (to in see which status the entity has been before)
- [x] implemented test for status changes with POST orders/{id} action. these tests currently include edit and confirm actions
- [x] terms of delivery / payment are now editable rows (instead of selects)
- [x] gather feedback for my changes

__Informations:__

| Q             | A
| ------------- | ---
| Tests pass?   | yes
| Fixed tickets | -
| BC Breaks     | -
| Doc           | -