Use an existing library for a worker pool

[semanser]

We should use some solution as the worker pool, instead of implementing our own (which is blocking on every operation).

codel/backend/executor/queue.go

Lines 26 to 32 in b10a9da

	func ProcessQueue(db *gorm.DB) {
	log.Println("Starting tasks processor")
	go func() {
	for {
	log.Println("Waiting for a task")
	task := <-queue

So far the closest option to what we need is pond - https://github.com/alitto/pond.

[ralyodio]

unfortunately i'm not a go guy so i can't help you there.