XX-4565 / Sequential web worker

indexedDb/impl/channels/callbacks.go

indexedDb/impl/channels/implementation_test.go

indexedDb/impl/channels/init.go

indexedDb/impl/dm/callbacks.go

indexedDb/impl/dm/implementation_test.go

indexedDb/impl/dm/init.go

indexedDb/worker/channels/init.go

indexedDb/worker/channels/tags.go

indexedDb/worker/dm/init.go

indexedDb/worker/dm/tags.go

logging/logger.go

worker/manager.go

worker/manager_test.go

worker/thread.go

worker/thread_test.go