feat(FN-4626): complete Step 5 — align worktrunk failure payload shape

Fusion-Task-Id: FN-4626
Fusion-Task-Lineage: 04b06bf6-b08c-4ff1-b69a-ab93f6e508b3

packages/engine/src/worktree-acquisition.ts

@@ -119,7 +119,13 @@ export async function acquireTaskWorktree(opts: AcquireTaskWorktreeOptions): Pro
     const stderr = error instanceof WorktrunkOperationError ? error.stderr : undefined;
     const exitCode = error instanceof WorktrunkOperationError ? error.exitCode : null;
     const disposition = await handleWorktrunkOperationFailure({
-      failure: { op, cause: error, stderr, exitCode },
+      failure: {
+        op,
+        cause: error,
+        stderr,
+        exitCode,
+        worktreePath,
+      },
       task,
       settings: settings.worktrunk ?? {},
       store,

packages/engine/src/worktrunk-failure-handler.ts

@@ -14,6 +14,7 @@ export interface WorktrunkOperationFailure {
   exitCode?: number | null;
   durationMs?: number;
   binaryPath?: string;
+  worktreePath?: string;
 }
 
 export type WorktreeOperationResult = { path: string; branch: string } | { skipped: boolean } | void;
@@ -73,6 +74,7 @@ async function pauseTaskWithFailure(
       exitCode: failure.exitCode ?? null,
       stderrPreview: toStderrPreview(failure.stderr),
       binaryPath: failure.binaryPath,
+      worktreePath: failure.worktreePath,
       durationMs: failure.durationMs,
     },
   });
@@ -118,6 +120,7 @@ export async function handleWorktrunkOperationFailure(params: HandleFailureParam
         exitCode: failure.exitCode ?? null,
         stderrPreview: toStderrPreview(failure.stderr),
         binaryPath: failure.binaryPath,
+        worktreePath: failure.worktreePath,
         durationMs: failure.durationMs,
         alerted,
       },