fix(prompt-retry): preserve async holds without blocking validation fallbacks

src/tools/delegate-task/tools.test.ts

@@ -9,6 +9,7 @@ import { clearSkillCache } from "../../features/opencode-skill-loader/skill-cont
 import { __setTimingConfig, __resetTimingConfig } from "./timing"
 import * as connectedProvidersCache from "../../shared/connected-providers-cache"
 import * as executor from "./executor"
+import { releaseAllPromptAsyncReservationsForTesting } from "../../shared/prompt-async-gate"
 
 const runtimeRequire = require as NodeJS.Require & { cache?: Record<string, unknown> }
 
@@ -78,6 +79,7 @@ describe("sisyphus-task", () => {
 
   afterEach(() => {
     __resetTimingConfig()
+    releaseAllPromptAsyncReservationsForTesting()
     cacheSpy?.mockRestore()
     providerModelsSpy?.mockRestore()
   })