Migrate LiveSync flows to provider-owned resources

src/common/ownedRemoteResource.ts

@@ -0,0 +1,18 @@
+/**
+ * Run a finite operation with a flow-owned remote resource and release it
+ * after either success or failure.
+ *
+ * Resource implementations make `dispose()` idempotent. This helper makes the
+ * caller's ownership boundary explicit and prevents finite flows from leaking
+ * a provider-owned resource when their operation rejects.
+ */
+export async function withOwnedRemoteResource<TResource extends { dispose(): Promise<void> }, TResult>(
+    resource: TResource,
+    operation: (ownedResource: TResource) => Promise<TResult>
+): Promise<TResult> {
+    try {
+        return await operation(resource);
+    } finally {
+        await resource.dispose();
+    }
+}