[performance] processing media and scheduled jobs improvements (#1482)

* replace media workers with just runners.WorkerPool, move to state structure, use go-sched for global task scheduling

* improved code comment

* fix worker tryUntil function, update go-runners/go-sched

* make preprocess functions package public, use these where possible to stop doubled up processing

* remove separate emoji worker pool

* limit calls to time.Now() during media preprocessing

* use Processor{} to manage singular runtime of processing media

* ensure workers get started when media manager is used

* improved error setting in processing media, fix media test

* port changes from processingmedia to processing emoji

* finish code commenting

* finish code commenting and comment-out client API + federator worker pools until concurrency worker pools replaced

* linterrrrrrrrrrrrrrrr

---------

Signed-off-by: kim <grufwub@gmail.com>

internal/state/state.go

@@ -21,6 +21,8 @@ package state
 import (
 	"github.com/superseriousbusiness/gotosocial/internal/cache"
 	"github.com/superseriousbusiness/gotosocial/internal/db"
+	"github.com/superseriousbusiness/gotosocial/internal/storage"
+	"github.com/superseriousbusiness/gotosocial/internal/workers"
 )
 
 // State provides a means of dependency injection and sharing of resources
@@ -36,6 +38,12 @@ type State struct {
 	// DB provides access to the database.
 	DB db.DB
 
+	// Storage provides access to the storage driver.
+	Storage *storage.Driver
+
+	// Workers provides access to this state's collection of worker pools.
+	Workers workers.Workers
+
 	// prevent pass-by-value.
 	_ nocopy
 }