* start replacing client + federator + media workers with new worker + queue types
* refactor federatingDB.Delete(), drop queued messages when deleting account / status
* move all queue purging to the processor workers
* undo toolchain updates
* code comments, ensure dereferencer worker pool gets started
* update gruf libraries in readme
* start the job scheduler separately to the worker pools
* reshuffle ordering or server.go + remove duplicate worker start / stop
* update go-list version
* fix vendoring
* move queue invalidation to before wipeing / deletion, to ensure queued work not dropped
* add logging to worker processing functions in testrig, don't start workers in unexpected places
* update go-structr to add (+then rely on) QueueCtx{} type
* ensure more worker pools get started properly in tests
* fix remaining broken tests relying on worker queue logic
* fix account test suite queue popping logic, ensure noop workers do not pull from queue
* move back accidentally shuffled account deletion order
* ensure error (non nil!!) gets passed in refactored federatingDB{}.Delete()
* silently drop deletes from accounts not permitted to
* don't warn log on forwarded deletes
* make if else clauses easier to parse
* use getFederatorMsg()
* improved code comment
* improved code comment re: requesting account delete checks
* remove boolean result from worker start / stop since false = already running or already stopped
* remove optional passed-in http.client
* remove worker starting from the admin CLI commands (we don't need to handle side-effects)
* update prune cli to start scheduler but not all of the workers
* fix rebase issues
* remove redundant return statements
* i'm sorry sir linter
