fix(core): batch plugin shutdown

packages/core/test/plugin.test.ts

@@ -46,6 +46,40 @@ describe("PluginV2", () => {
     }),
   )
 
+  it.effect("batches plugin state rebuilds when the registry layer finalizes", () =>
+    Effect.gen(function* () {
+      let finalized = 0
+      const values = State.create({
+        initial: () => ({ values: [] as string[] }),
+        draft: (draft) => ({ add: (value: string) => draft.values.push(value) }),
+        finalize: () => Effect.sync(() => finalized++),
+      })
+      const layerScope = yield* Scope.fork(yield* Scope.Scope)
+      const plugin = Context.get(yield* Layer.buildWithScope(Layer.fresh(plugins), layerScope), PluginV2.Service)
+
+      yield* State.batch(
+        Effect.forEach(
+          ["first", "second"],
+          (id) =>
+            plugin.add({
+              id: PluginV2.ID.make(id),
+              effect: values
+                .transform((editor) => {
+                  editor.add(id)
+                })
+                .pipe(Effect.asVoid),
+            }),
+          { discard: true },
+        ),
+      )
+      finalized = 0
+
+      yield* Scope.close(layerScope, Exit.void)
+      expect(values.get().values).toEqual([])
+      expect(finalized).toBe(1)
+    }),
+  )
+
   it.effect("serializes same-ID additions and leaves one removable attachment", () =>
     Effect.gen(function* () {
       const values = state()