Provide controller resources at construction time

Load hosts, instances, mod packs, mods and users before constructing the
Controller instances.  This allows these resources to be correctly typed
as always available and prevents any possibility of save being initiated
on these resources before they are loaded.

packages/controller/src/ControllerRouter.ts

@@ -40,7 +40,7 @@ export default class ControllerRouter {
 				msg = `Host ${dst.id} is offline`;
 			}
 		} else if (dst.type === lib.Address.instance) {
-			let instance = this.controller.instances!.get(dst.id);
+			let instance = this.controller.instances.get(dst.id);
 			if (!instance) {
 				msg = `Instance ${dst.id} does not exist`;
 			} else {