fix(conformance): withCapture propagates inner brands + chain test + docstring fixes

packages/core-shared/src/instrumentation/with-capture.ts

@@ -28,6 +28,8 @@ export function withCapture<Args extends unknown[], R>(
   tags: Record<string, string>,
   fn: (...args: Args) => Promise<R>,
 ): Captured<(...args: Args) => Promise<R>> {
+  const PROPAGATED_BRANDS = ["__instrumented", "__audited"] as const;
+
   const wrapped: (...args: Args) => Promise<R> = async (...args) => {
     try {
       return await fn(...args);
@@ -39,6 +41,14 @@ export function withCapture<Args extends unknown[], R>(
       throw err;
     }
   };
+  // Propagate brands from the inner function (e.g. __audited from withAudit,
+  // __instrumented if already spanned) so the outermost binding carries all brands.
+  // __captured is omitted here because it is attached explicitly below.
+  for (const brand of PROPAGATED_BRANDS) {
+    if ((fn as unknown as Record<string, unknown>)[brand] === true) {
+      attachBrand(wrapped, brand);
+    }
+  }
   attachBrand(wrapped, "__captured");
   return wrapped as Captured<(...args: Args) => Promise<R>>;
 }