Help designing a motor control circuit
The requirement, in brief, is as follows:

A circular container is to rotate through 45°, once a day.

At the end of 8 days the top of the container is to be removed for refilling.


Here's how it could be accomplished:

Any suitable battery-powered motor could be used.

The mechanical interface between the motor and the container would be an 8-slot internal Geneva Mechanism, which could be fabricated to suit.



Image courtesy 'Mechnovashia'.
One revolution of the motor, linked through a single pin (shown in green) to the slotted plate (shown in orange), would rotate the latter through 45°.
The following animation very clearly shows the working of the mechanism.
https://www.youtube.com/watch?v=WekkYlHdJko

A quartz clock based timer could be used to trigger a single rotation of the motor once in 24 hours.

The advantages of this scheme would be

No need for any special controller
No need for any programming
No need for a reset once in 8 days.