Implement request status "Closed - Unfilled"

Purpose: To enable requests to expire based on the Request expiration date, which results in the new request status "Closed - Unfilled"

User story:
As a user who needs a book by a certain date but, after that date, the book will no longer be useful to me
I want to set an expiration date for my request
So that, if the date passes and I still haven't received the book, my request will automatically close (as I really no longer need it)

Scenarios:

1. Scenario
   • Given a request with request status = "Open - Not yet filled"
   • When the request's "Request expiration date" passes
   • Then:
     • The request status should change to "Closed - Unfilled"
     • The request is removed from the queue for the item by
       • removing it's position
       • re-positioning all other requests in the queue accordingly
     • The item status of the associated item should not change
     • No edit button or other edit option should appear (closed requests should never be editable)
2. Scenario
   • Given requested item A with request status "Closed - Unfilled"
   • When item A is checked in
   • Then check in should behave as it would if the closed request weren’t present - I will add some test scenarios to elaborate on how that logic should work)

Test Scenarios (to elaborate on scenario 2 above)
This functionality already works, we just need to make sure it still works in this new scenario

1. Scenario
   • Given a requested item A with Item status = Checked out AND Request X is in position 1 of the request queue and Request Y is in position 2 of the request queue
   • When Request X becomes "Closed - Unfilled" AND Item A is checked in at Service Point 1
   • Then:
     • Item status will change to Awaiting pickup if Request Y has pickup service point Service Point 1
     • Item status will change to In transit if Request Y has pickup service point other than Service Point 1
2. Scenario
   • Given a requested item A with Item status = Checked out AND Request X is in position 1 of the request queue AND there are no other requests in the request queue for that item
   • When Request X becomes "Closed - Unfilled" AND Item A is checked in at Service Point 1
   • Then:
     • Item status will change to Available if Item A's Effective location is related to Service Point 1
     • Item status will change to In transit if Item A's Effective location is not related to Service Point 1
3. Scenario
   • Given a requested item A with Item status = Paged AND Request X is in position 1 of the request queue AND there are no other requests in the request queue for that item
   • When Request X becomes "Closed - Unfilled" AND Item A is checked in at Service Point 1
   • Then:
     • Item status will change to Awaiting pickup if Item A's Effective location is related to Service Point 1
     • Item status will change to In transit if Item A's Effective location is related to a service point other than Service Point 1