Mutation refactoring

packages/extension-query/src/MutationService.ts

@@ -1,11 +1,14 @@
 import type * as AsyncData from "@typed/async-data"
-import { Effect, type Fiber, type SubscriptionRef } from "effect"
+import { Effect, type Fiber, type Stream, type SubscriptionRef } from "effect"
 
 
 export interface MutationService<K extends readonly unknown[], A, E> {
     readonly state: SubscriptionRef.SubscriptionRef<AsyncData.AsyncData<A, E>>
-    readonly mutate: (...key: K) => Effect.Effect<A, E>
-    readonly forkMutate: (...key: K) => Effect.Effect<Fiber.RuntimeFiber<A, E>>
+    readonly mutate: (...key: K) => Effect.Effect<AsyncData.Success<A> | AsyncData.Failure<E>>
+    readonly forkMutate: (...key: K) => Effect.Effect<readonly [
+        fiber: Fiber.RuntimeFiber<AsyncData.Success<A> | AsyncData.Failure<E>>,
+        state: Stream.Stream<AsyncData.AsyncData<A, E>>,
+    ]>
 }
 
 export const Tag = <const Id extends string>(id: Id) => <