Add support for jobs & queueables, migrations

- Create migration directives & migrators
- Modify Cache classes to support array manipulation
- Create Redis unit and RedisCache implementation
- Create Queueable base class and Queue class that uses Cache backend

src/service/Canonical.ts

@@ -7,6 +7,7 @@ import {Logging} from './Logging'
 import {Inject} from '../di'
 import * as nodePath from 'path'
 import {Unit} from '../lifecycle/Unit'
+import {isCanonicalReceiver} from '../support/CanonicalReceiver'
 
 /**
  * Interface describing a definition of a single canonical item loaded from the app.
@@ -228,7 +229,16 @@ export abstract class Canonical<T> extends Unit {
 
             const definition = await this.buildCanonicalDefinition(entry)
             this.logging.verbose(`Registering canonical ${this.canonicalItem} "${definition.canonicalName}" from ${entry}`)
-            this.loadedItems[definition.canonicalName] = await this.initCanonicalItem(definition)
+            const resolvedItem = await this.initCanonicalItem(definition)
+
+            if ( isCanonicalReceiver(resolvedItem) ) {
+                resolvedItem.setCanonicalResolver(
+                    `${this.canonicalItems}::${definition.canonicalName}`,
+                    definition.canonicalName,
+                )
+            }
+
+            this.loadedItems[definition.canonicalName] = resolvedItem
         }
 
         this.canon.registerCanonical(this)