fix: add type assertion to pass type checks

Author: lkk214

core/core.ts

@@ -121,7 +121,7 @@ export class Core {
       // AsyncGenerator handling (intentionally skipping return/throw as caller only consumes via next())
       return (async function* () {
         try {
-          yield* result;
+          yield* (result as AsyncGenerator<any>);
         } finally {
           cleanup();
         }