Disallow unsafe type assertions (#18688)

packages/core/src/tools/memoryTool.ts

@@ -94,6 +94,7 @@ async function readMemoryFileContent(): Promise<string> {
   try {
     return await fs.readFile(getGlobalMemoryFilePath(), 'utf-8');
   } catch (err) {
+    // eslint-disable-next-line @typescript-eslint/no-unsafe-type-assertion
     const error = err as Error & { code?: string };
     if (!(error instanceof Error) || error.code !== 'ENOENT') throw err;
     return '';