fix: recover confirmed worker restore failures

crates/workspace-server/src/server/tests/restored_parent_control_tests.rs

@@ -85,7 +85,10 @@ impl RuntimeWorkerFactory for CapturingFactory {
     async fn restore_controller(
         &self,
         request: worker_runtime::execution::WorkerExecutionRestoreRequest,
-    ) -> std::result::Result<RuntimeWorkerController, String> {
+    ) -> std::result::Result<
+        RuntimeWorkerController,
+        worker_runtime::worker_backend::RuntimeRestoreFailure,
+    > {
         let worker_ref = request.worker_ref.clone();
         let controller = self.inner.restore_controller(request).await?;
         self.captures

crates/workspace-server/src/server_assignment_attention_tests.rs

@@ -494,9 +494,18 @@ impl worker_runtime::worker_backend::RuntimeWorkerFactory for AttentionWorkerFac
     async fn restore_controller(
         &self,
         request: worker_runtime::execution::WorkerExecutionRestoreRequest,
-    ) -> std::result::Result<worker_runtime::worker_backend::RuntimeWorkerController, String> {
+    ) -> std::result::Result<
+        worker_runtime::worker_backend::RuntimeWorkerController,
+        worker_runtime::worker_backend::RuntimeRestoreFailure,
+    > {
         self.controller(request.worker_ref.worker_id.to_string(), true)
             .await
+            .map_err(|_| {
+                worker_runtime::worker_backend::RuntimeRestoreFailure::unproven(
+                    worker_runtime::worker_backend::RuntimeRestoreStage::Reconstruction,
+                    "attention fixture reconstruction failed",
+                )
+            })
     }
 }
 

crates/workspace-server/src/server_assignment_delivery_tests.rs

@@ -832,9 +832,18 @@ impl worker_runtime::worker_backend::RuntimeWorkerFactory for DeliveryWorkerFact
     async fn restore_controller(
         &self,
         request: delivery_execution::WorkerExecutionRestoreRequest,
-    ) -> std::result::Result<worker_runtime::worker_backend::RuntimeWorkerController, String> {
+    ) -> std::result::Result<
+        worker_runtime::worker_backend::RuntimeWorkerController,
+        worker_runtime::worker_backend::RuntimeRestoreFailure,
+    > {
         self.controller(request.worker_ref.worker_id.to_string(), true)
             .await
+            .map_err(|_| {
+                worker_runtime::worker_backend::RuntimeRestoreFailure::unproven(
+                    worker_runtime::worker_backend::RuntimeRestoreStage::Reconstruction,
+                    "delivery fixture reconstruction failed",
+                )
+            })
     }
 }
 

crates/workspace-server/src/server_workspace_config_wip_tests.rs

@@ -584,7 +584,10 @@ impl worker_runtime::worker_backend::RuntimeWorkerFactory for ConfigCaptureFacto
     async fn restore_controller(
         &self,
         request: worker_runtime::execution::WorkerExecutionRestoreRequest,
-    ) -> std::result::Result<worker_runtime::worker_backend::RuntimeWorkerController, String> {
+    ) -> std::result::Result<
+        worker_runtime::worker_backend::RuntimeWorkerController,
+        worker_runtime::worker_backend::RuntimeRestoreFailure,
+    > {
         self.inner.restore_controller(request).await
     }
 }