* Add test file for testing path_restore in Transit backend. Fails because 'force' is not implemented yet
* initial implementation of 'force', to force restore of existing transit key atomically
* Start work on passing context to backends
* More work on passing context
* Unindent logical system
* Unindent token store
* Unindent passthrough
* Unindent cubbyhole
* Fix tests
* use requestContext in rollback and expiration managers