New offer status called "Finished" - Status changed to: Investigating

[#1]

Description -

Whenever an offer with status "Approved" has passed its offer end date, the offer is no longer available to customers but it still keeps the status "Approved". This can cause confusing for the AJO user since it's not clear whether the offer is available to customers or not.

Why is this feature important to you -

We mainly use offers as a way to communicate with our customers and we find it confusing and prone to mistakes when at first glance seeing an offer with status "Approved" but then also have to check the offer end date.

We would also like to filter on "Approved" offers where the end date is passed or not.

How would you like the feature to work -

We would like to have a new offer status introduced called "Finished". The criteria for this status would be that any "Approved" offer that has passed its offer end date will change status to "Finished".