All processables are now created with an instance of Configuration, and they use that instance's settings.
Added Configuration.CreateEphemeralCopy() to clone Configuration without persistence.
- Remove instance queue. This is a database, after all, and is designed to be accessed and written to concurrently
- Reduce the number of calls to DbContexts.Create()
- Ensure that no LibationContext remains open across an await boundary. Multithread context access is the most likely culprit for past issues.
- Make all Update UserDefinedItem methods asynchronous.
