test(control-plane): port workspace.test.ts to it.instance (#28572)

packages/opencode/src/session/session.ts

@@ -1,4 +1,5 @@
 import { Slug } from "@opencode-ai/core/util/slug"
+import { serviceUse } from "@/effect/service-use"
 import path from "path"
 import { BackgroundJob } from "@/background/job"
 import { BusEvent } from "@/bus/bus-event"
@@ -500,6 +501,8 @@ export interface Interface {
 
 export class Service extends Context.Service<Service, Interface>()("@opencode/Session") {}
 
+export const use = serviceUse(Service)
+
 export type Patch = Types.DeepMutable<SyncEvent.Event<typeof Event.Updated>["data"]["info"]>
 
 const db = <T>(fn: (d: Parameters<typeof Database.use>[0] extends (trx: infer D) => any ? D : never) => T) =>