Unify concepts and naming around pending, ignore list, released, etc tickets

[Laremere]

There's currently several different names and concepts around ticket state where it has been returned from a fetch match calls, but it has not yet been assigned or deleted. In the API surface, documentation, and internal code this doesn't have a consistent conceptual model.

The task is a consistent conceptual model on ticket state should be developed. Names and documentation should be changed to follow this conceptual model.